Live analysis

12,021

12,021 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

12,021 (twelve thousand twenty-one) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 3 × 4,007. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in hexadecimal, 0x2EF5.

Arithmetic Number Cube-Free Deficient Number Evil Number Happy Number Palindrome Recamán's Sequence Semiprime Squarefree

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

12,009 12,010 12,011 12,012 12,013 12,014 12,015 12,016 12,017 12,018 12,019 12,020 12,021 12,022 12,023 12,024 12,025 12,026 12,027 12,028 12,029 12,030 12,031 12,032 12,033

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 6
Digit product: 0
Digital root: 6
Palindrome: Yes
Bit width: 14 bits
Recamán's sequence: a(22,742) = 12,021
Square (n²): 144,504,441
Cube (n³): 1,737,087,885,261
Divisor count: 4
σ(n) — sum of divisors: 16,032
φ(n) — Euler's totient: 8,012
Sum of prime factors: 4,010

Primality

Prime factorization: 3 × 4007

Nearest primes: 12,011 (−10) · 12,037 (+16)

Divisors & multiples

All divisors (4)

1 · 3 · 4007 · 12021

Aliquot sum (sum of proper divisors): 4,011

Factor pairs (a × b = 12,021)

1 × 12021

3 × 4007

First multiples

12,021 · 24,042 (double) · 36,063 · 48,084 · 60,105 · 72,126 · 84,147 · 96,168 · 108,189 · 120,210

Sums & aliquot sequence

As consecutive integers: 6,010 + 6,011 4,006 + 4,007 + 4,008 2,001 + 2,002 + 2,003 + 2,004 + 2,005 + 2,006

Aliquot sequence: 12,021 → 4,011 → 2,133 → 1,067 → 109 → 1 → 0 — terminates at zero

Continued fraction of √n

√12,021 = [109; (1, 1, 1, 3, 1, 1, 4, 2, 2, 1, 3, 2, 2, 1, 13, 1, 10, 31, 4, 3, 1, 2, 1, 4, …)]

Representations

In words: twelve thousand twenty-one
Ordinal: 12021st
Binary: 10111011110101
Octal: 27365
Hexadecimal: 0x2EF5
Base64: LvU=
One's complement: 53,514 (16-bit)
Scientific notation: 1.2021 × 10⁴
As a duration: 12,021 s = 3 hours, 20 minutes, 21 seconds

In other bases

ternary (3) 121111020

quaternary (4) 2323311

quinary (5) 341041

senary (6) 131353

septenary (7) 50022

nonary (9) 17436

undecimal (11) 9039

duodecimal (12) 6b59

tridecimal (13) 5619

tetradecimal (14) 4549

pentadecimal (15) 3866

As an angle

12,021° = 33 × 360° + 141°

141° ≈ 2.461 rad

Compass bearing: SE (southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒌋 𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓆼𓆼𓎆𓎆𓏺
Greek (Milesian): ͵ιβκαʹ
Mayan (base 20): 𝋡·𝋪·𝋡·𝋡
Chinese: 一萬二千零二十一
Chinese (financial): 壹萬貳仟零貳拾壹

In other modern scripts

Eastern Arabic ١٢٠٢١ Devanagari १२०२१ Bengali ১২০২১ Tamil ௧௨௦௨௧ Thai ๑๒๐๒๑ Tibetan ༡༢༠༢༡ Khmer ១២០២១ Lao ໑໒໐໒໑ Burmese ၁၂၀၂၁

Digit at this position in famous constants

π — Pi (π): Digit 12,021 = 2
e — Euler's number (e): Digit 12,021 = 9
φ — Golden ratio (φ): Digit 12,021 = 9
√2 — Pythagoras's (√2): Digit 12,021 = 7
ln 2 — Natural log of 2: Digit 12,021 = 6
γ — Euler-Mascheroni (γ): Digit 12,021 = 0

Also seen as

Hex color

#002EF5

RGB(0, 46, 245)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.46.245.

Address: 0.0.46.245
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.46.245

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 12,021 Hz is closest to:

Concert pitch (A4 = 440 Hz): F♯9 (11839.8 Hz, +26¢)
Scientific pitch (C4 = 256 Hz): G9 (12274.1 Hz, -36¢)
Baroque pitch (A4 = 415 Hz): G9 (11831.1 Hz, +28¢)

Position in π

The digit sequence 12021 first appears in π at position 78,286 of the decimal expansion (the 78,286ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 12021 on Pi Search ↗