20,121
20,121 is a composite number, odd.
20,121 (twenty thousand one hundred twenty-one) is an odd 5-digit number. It is a composite number with 8 divisors, and factors as 3 × 19 × 353. Written other ways, in hexadecimal, 0x4E99.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 6
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 12,102
- Square (n²)
- 404,854,641
- Cube (n³)
- 8,146,080,231,561
- Divisor count
- 8
- σ(n) — sum of divisors
- 28,320
- φ(n) — Euler's totient
- 12,672
- Sum of prime factors
- 375
Primality
Prime factorization: 3 × 19 × 353
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√20,121 = [141; (1, 5, 1, 1, 1, 1, 34, 1, 5, 1, 18, 17, 1, 2, 9, 2, 3, 1, 8, 11, 4, 3, 1, 1, …)]
Representations
- In words
- twenty thousand one hundred twenty-one
- Ordinal
- 20121st
- Binary
- 100111010011001
- Octal
- 47231
- Hexadecimal
- 0x4E99
- Base64
- Tpk=
- One's complement
- 45,414 (16-bit)
- Scientific notation
- 2.0121 × 10⁴
- As a duration
- 20,121 s = 5 hours, 35 minutes, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵κρκαʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋦·𝋡
- Chinese
- 二萬零一百二十一
- Chinese (financial)
- 貳萬零壹佰貳拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,121 = 9
- e — Euler's number (e)
- Digit 20,121 = 5
- φ — Golden ratio (φ)
- Digit 20,121 = 8
- √2 — Pythagoras's (√2)
- Digit 20,121 = 7
- ln 2 — Natural log of 2
- Digit 20,121 = 6
- γ — Euler-Mascheroni (γ)
- Digit 20,121 = 6
Also seen as
UTF-8 encoding: E4 BA 99 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.153.
- Address
- 0.0.78.153
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.78.153
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20121 first appears in π at position 14,528 of the decimal expansion (the 14,528ordinal-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.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.