Number
13,121
13,121 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 6
- Digital root
- 8
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 12,131
- Recamán's sequence
- a(48,033) = 13,121
- Square (n²)
- 172,160,641
- Cube (n³)
- 2,258,919,770,561
- Divisor count
- 2
- σ(n) — sum of divisors
- 13,122
- φ(n) — Euler's totient
- 13,120
Primality
13,121 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Sums & aliquot sequence
As a sum of two squares:
64² + 95²
As consecutive integers:
6,560 + 6,561
Representations
- In words
- thirteen thousand one hundred twenty-one
- Ordinal
- 13121st
- Binary
- 11001101000001
- Octal
- 31501
- Hexadecimal
- 0x3341
- Base64
- M0E=
- One's complement
- 52,414 (16-bit)
In other bases
ternary (3)
122222222
quaternary (4)
3031001
quinary (5)
404441
senary (6)
140425
septenary (7)
53153
nonary (9)
18888
undecimal (11)
9949
duodecimal (12)
7715
tridecimal (13)
5c84
tetradecimal (14)
4ad3
pentadecimal (15)
3d4b
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ιγρκαʹ
- Mayan (base 20)
- 𝋡·𝋬·𝋰·𝋡
- Chinese
- 一萬三千一百二十一
- Chinese (financial)
- 壹萬參仟壹佰貳拾壹
In other modern scripts
Eastern Arabic
١٣١٢١
Devanagari
१३१२१
Bengali
১৩১২১
Tamil
௧௩௧௨௧
Thai
๑๓๑๒๑
Tibetan
༡༣༡༢༡
Khmer
១៣១២១
Lao
໑໓໑໒໑
Burmese
၁၃၁၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,121 = 4
- e — Euler's number (e)
- Digit 13,121 = 3
- φ — Golden ratio (φ)
- Digit 13,121 = 9
- √2 — Pythagoras's (√2)
- Digit 13,121 = 4
- ln 2 — Natural log of 2
- Digit 13,121 = 3
- γ — Euler-Mascheroni (γ)
- Digit 13,121 = 7
Also seen as
Prime neighborhood
Unicode codepoint
㍁
Square Hooru
U+3341
Other symbol (So)
UTF-8 encoding: E3 8D 81 (3 bytes).
Hex color
#003341
RGB(0, 51, 65)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.51.65.
- Address
- 0.0.51.65
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.51.65
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 13121 first appears in π at position 89,023 of the decimal expansion (the 89,023ordinal-suffix:rd 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.