number.wiki
Number

3,121

3,121 is a prime, odd.

Deficient Number Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
4
Digit sum
7
Digital root
7
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
3,122

Primality

3,121 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 3121
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 3,121)
1 × 3121
First multiples
3,121 · 6,242 · 9,363 · 12,484 · 15,605 · 18,726 · 21,847 · 24,968 · 28,089 · 31,210

Representations

In words
three thousand one hundred twenty-one
Ordinal
3121st
Roman numeral
MMMCXXI
Binary
110000110001
Octal
6061
Hexadecimal
C31

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 3,119 (gap of 2)
  • Next prime: 3,137 (gap of 16)

Pair status: twin with 3119.

Unicode codepoint
U+0C31
Other letter (Lo)

UTF-8 encoding: E0 B0 B1 (3 bytes).

Hex color
#000C31
RGB(0, 12, 49)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.12.49.