number.wiki
Number

101

101 is a prime, odd, a calendar year.

Cousin Prime Deficient Number Palindrome Prime Sexy Prime Squarefree Strobogrammatic Twin Prime Year

Properties

Parity
Odd
Digit count
3
Digit sum
2
Digital root
2
Palindrome
Yes
Divisor count
2
σ(n) — sum of divisors
102

Primality

101 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 101
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 101)
1 × 101
First multiples
101 · 202 · 303 · 404 · 505 · 606 · 707 · 808 · 909 · 1,010

Representations

In words
one hundred one
Ordinal
101st
Roman numeral
CI
Binary
1100101
Octal
145
Hexadecimal
65

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 97 (gap of 4)
  • Next prime: 103 (gap of 2)

Pair status: twin with 103, cousin with 97.

ASCII character

As an ASCII codepoint, 101 is e. Printable ASCII character e.

HTTP status code

HTTP 101 Switching Protocols — Server is switching protocols at the client's request (e.g., to WebSocket).

1xx class: Informational.

Hex color
#000065
RGB(0, 0, 101)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.101.