121,990
121,990 is a composite number, even.
121,990 (one hundred twenty-one thousand nine hundred ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 11 × 1,109. Written other ways, in hexadecimal, 0x1DC86.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 99,121
- Square (n²)
- 14,881,560,100
- Cube (n³)
- 1,815,401,516,599,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 239,760
- φ(n) — Euler's totient
- 44,320
- Sum of prime factors
- 1,127
Primality
Prime factorization: 2 × 5 × 11 × 1109
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√121,990 = [349; (3, 1, 2, 3, 1, 1, 1, 6, 2, 2, 1, 1, 32, 1, 2, 8, 3, 2, 12, 1, 1, 49, 2, 1, …)]
Representations
- In words
- one hundred twenty-one thousand nine hundred ninety
- Ordinal
- 121990th
- Binary
- 11101110010000110
- Octal
- 356206
- Hexadecimal
- 0x1DC86
- Base64
- AdyG
- One's complement
- 4,294,845,305 (32-bit)
- Scientific notation
- 1.2199 × 10⁵
- As a duration
- 121,990 s = 1 day, 9 hours, 53 minutes, 10 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρκαϡϟʹ
- Mayan (base 20)
- 𝋯·𝋤·𝋳·𝋪
- Chinese
- 一十二萬一千九百九十
- Chinese (financial)
- 壹拾貳萬壹仟玖佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 121990, here are decompositions:
- 23 + 121967 = 121990
- 41 + 121949 = 121990
- 53 + 121937 = 121990
- 59 + 121931 = 121990
- 101 + 121889 = 121990
- 107 + 121883 = 121990
- 137 + 121853 = 121990
- 227 + 121763 = 121990
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.1.220.134.
- Address
- 0.1.220.134
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.220.134
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 121,990 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 121990 first appears in π at position 524,646 of the decimal expansion (the 524,646ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.