131,221
131,221 is a prime, odd.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 10
- Digit product
- 12
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 122,131
- Square (n²)
- 17,218,950,841
- Cube (n³)
- 2,259,487,948,306,861
- Divisor count
- 2
- σ(n) — sum of divisors
- 131,222
- φ(n) — Euler's totient
- 131,220
Primality
131,221 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,221 = [362; (4, 10, 1, 8, 1, 1, 1, 1, 1, 4, 48, 12, 18, 2, 37, 1, 1, 1, 4, 3, 180, 1, 4, 3, …)]
Representations
- In words
- one hundred thirty-one thousand two hundred twenty-one
- Ordinal
- 131221st
- Binary
- 100000000010010101
- Octal
- 400225
- Hexadecimal
- 0x20095
- Base64
- AgCV
- One's complement
- 4,294,836,074 (32-bit)
- Scientific notation
- 1.31221 × 10⁵
- As a duration
- 131,221 s = 1 day, 12 hours, 27 minutes, 1 second
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλασκαʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋡·𝋡
- Chinese
- 一十三萬一千二百二十一
- Chinese (financial)
- 壹拾參萬壹仟貳佰貳拾壹
Also seen as
UTF-8 encoding: F0 A0 82 95 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.0.149.
- Address
- 0.2.0.149
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.0.149
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,221 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131221 first appears in π at position 653,435 of the decimal expansion (the 653,435ordinal-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.