121,121
121,121 is a composite number, odd.
121,121 (one hundred twenty-one thousand one hundred twenty-one) is an odd 6-digit number. It is a composite number with 16 divisors, and factors as 7 × 11³ × 13. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in hexadecimal, 0x1D921.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 8
- Digit product
- 4
- Digital root
- 8
- Palindrome
- Yes
- Bit width
- 17 bits
- Square (n²)
- 14,670,296,641
- Cube (n³)
- 1,776,880,999,454,561
- Divisor count
- 16
- σ(n) — sum of divisors
- 163,968
- φ(n) — Euler's totient
- 87,120
- Sum of prime factors
- 53
Primality
Prime factorization: 7 × 11 3 × 13
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,121 = [348; (40, 1, 16, 2, 2, 1, 6, 5, 1, 1, 1, 1, 10, 1, 4, 10, 1, 2, 19, 1, 1, 5, 4, 5, …)]
Representations
- In words
- one hundred twenty-one thousand one hundred twenty-one
- Ordinal
- 121121st
- Binary
- 11101100100100001
- Octal
- 354441
- Hexadecimal
- 0x1D921
- Base64
- Adkh
- One's complement
- 4,294,846,174 (32-bit)
- Scientific notation
- 1.21121 × 10⁵
- As a duration
- 121,121 s = 1 day, 9 hours, 38 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρκαρκαʹ
- Mayan (base 20)
- 𝋯·𝋢·𝋰·𝋡
- Chinese
- 一十二萬一千一百二十一
- Chinese (financial)
- 壹拾貳萬壹仟壹佰貳拾壹
Also seen as
UTF-8 encoding: F0 9D A4 A1 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.217.33.
- Address
- 0.1.217.33
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.217.33
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 121,121 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.