The Natural Number 121

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Properties of the Number 121

  • Because 121 is not divisible by 2 ...
    • 121 is an odd number
    • 121 has parity 1
    • 121 is not an even number
  • Because 121 can be factored as 11 x 11 ...
    • 121 is a composite number
    • 121 is not a prime number

Alternative Representations of the Number 121

  • Base 2 (binary): 1111001
  • Base 8 (octal): 171
  • Base 16 (hexadecimal): 79
  • Roman numeral: CXXI
  • Words: one hundred twenty-one

Divisors of the Number 121

  • 121 has 3 positive divisors: 1, 11, 121
    • The sum of the positive divisors is 133
  • 121 has 2 proper divisors: 1, 11
    • The sum of the proper divisors is 12
  • 121 is a deficient number since the sum of the proper divisors is less than 121
  • 121 is not a perfect number
  • 121 is not an abundant number

More Properties of the Number 121

  • 121 is a square number (i.e., square of the natural number 11)
  • 121 is not a cube number
  • 121 is a palindromic number (i.e., the digits are the same forwards and backwards)
  • 121 is not a Fibonacci number
  • 121 is not a Lucas number

4:16 am, Thursday, March 23, 2017 (UTC; +0000)
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