121,001
121,001 is a prime, odd.
121,001 (one hundred twenty-one thousand one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1D8A9.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 5
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 100,121
- Square (n²)
- 14,641,242,001
- Cube (n³)
- 1,771,604,923,363,001
- Divisor count
- 2
- σ(n) — sum of divisors
- 121,002
- φ(n) — Euler's totient
- 121,000
Primality
121,001 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,001 = [347; (1, 5, 1, 3, 10, 2, 3, 1, 20, 1, 26, 1, 6, 1, 16, 10, 1, 1, 1, 4, 4, 1, 3, 1, …)]
Representations
- In words
- one hundred twenty-one thousand one
- Ordinal
- 121001st
- Binary
- 11101100010101001
- Octal
- 354251
- Hexadecimal
- 0x1D8A9
- Base64
- Adip
- One's complement
- 4,294,846,294 (32-bit)
- Scientific notation
- 1.21001 × 10⁵
- As a duration
- 121,001 s = 1 day, 9 hours, 36 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓏺
- Greek (Milesian)
- ͵ρκααʹ
- Mayan (base 20)
- 𝋯·𝋢·𝋪·𝋡
- Chinese
- 一十二萬一千零一
- Chinese (financial)
- 壹拾貳萬壹仟零壹
Also seen as
UTF-8 encoding: F0 9D A2 A9 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.216.169.
- Address
- 0.1.216.169
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.216.169
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 121,001 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 121001 first appears in π at position 842,508 of the decimal expansion (the 842,508ordinal-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
- 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.