121,013
121,013 is a prime, odd.
121,013 (one hundred twenty-one thousand thirteen) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1D8B5.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 310,121
- Square (n²)
- 14,644,146,169
- Cube (n³)
- 1,772,132,060,349,197
- Divisor count
- 2
- σ(n) — sum of divisors
- 121,014
- φ(n) — Euler's totient
- 121,012
Primality
121,013 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,013 = [347; (1, 6, 1, 1, 1, 4, 1, 23, 5, 1, 21, 1, 1, 1, 1, 4, 173, 1, 2, 1, 1, 6, 5, 2, …)]
Period length 53 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-one thousand thirteen
- Ordinal
- 121013th
- Binary
- 11101100010110101
- Octal
- 354265
- Hexadecimal
- 0x1D8B5
- Base64
- Adi1
- One's complement
- 4,294,846,282 (32-bit)
- Scientific notation
- 1.21013 × 10⁵
- As a duration
- 121,013 s = 1 day, 9 hours, 36 minutes, 53 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκαιγʹ
- Mayan (base 20)
- 𝋯·𝋢·𝋪·𝋭
- Chinese
- 一十二萬一千零一十三
- Chinese (financial)
- 壹拾貳萬壹仟零壹拾參
Also seen as
UTF-8 encoding: F0 9D A2 B5 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.216.181.
- Address
- 0.1.216.181
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.216.181
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 121,013 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.