21,122
21,122 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 8
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 22,112
- Recamán's sequence
- a(41,595) = 21,122
- Square (n²)
- 446,138,884
- Cube (n³)
- 9,423,345,507,848
- Divisor count
- 8
- σ(n) — sum of divisors
- 32,400
- φ(n) — Euler's totient
- 10,324
- Sum of prime factors
- 240
Primality
Prime factorization: 2 × 59 × 179
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand one hundred twenty-two
- Ordinal
- 21122nd
- Binary
- 101001010000010
- Octal
- 51202
- Hexadecimal
- 0x5282
- Base64
- UoI=
- One's complement
- 44,413 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵καρκβʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋰·𝋢
- Chinese
- 二萬一千一百二十二
- Chinese (financial)
- 貳萬壹仟壹佰貳拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,122 = 8
- e — Euler's number (e)
- Digit 21,122 = 0
- φ — Golden ratio (φ)
- Digit 21,122 = 2
- √2 — Pythagoras's (√2)
- Digit 21,122 = 3
- ln 2 — Natural log of 2
- Digit 21,122 = 8
- γ — Euler-Mascheroni (γ)
- Digit 21,122 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21122, here are decompositions:
- 61 + 21061 = 21122
- 103 + 21019 = 21122
- 109 + 21013 = 21122
- 139 + 20983 = 21122
- 163 + 20959 = 21122
- 193 + 20929 = 21122
- 223 + 20899 = 21122
- 313 + 20809 = 21122
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8A 82 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.130.
- Address
- 0.0.82.130
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.130
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21122 first appears in π at position 30,877 of the decimal expansion (the 30,877ordinal-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.