122 (number)

From Wikipedia, the free encyclopedia
← 121 122 123 →
← 120 121 122 123 124 125 126 127 128 129 →
List of numbers — Integers
← 0 100 200 300 400 500 600 700 800 900 →
Cardinalone hundred twenty-two
Ordinal122nd
(one hundred twenty-second)
Factorization2 × 61
Divisors1, 2, 61, 122
Greek numeralΡΚΒ´
Roman numeralCXXII
Binary11110102
Ternary111123
Octal1728
DuodecimalA212
Hexadecimal7A16

122 (one hundred [and] twenty-two) is the natural number following 121 and preceding 123.

In mathematics[]

122 is a nontotient since there is no integer with exactly 122 coprimes below it. Nor is there an integer with exactly 122 integers with common factors below it, making 122 a noncototient.

122 is a semiprime.

122 is the sum of squares of the divisors of 11.

In telephony[]

  • The fire emergency telephone number in Austria[1]
  • The police emergency telephone number in Egypt
  • The traffic emergency telephone number in China
  • The police emergency telephone number in Bosnia and Herzegovina

In other fields[]

122 is also:

  • The atomic number of the chemical element unbibium
  • The number of men of Michmas at the census (Bible, Nehemiah 7:31)
  • The Enroute Flight Advisory Service (EFAS) "Flight Watch" frequency: 122.0 MHz
  • The oldest age in years to which a human being has ever been authenticated to live (Jeanne Calment).

See also[]

References[]

  1. ^ Porter, Darwin; Danforth Prince (2009). Frommer's Austria. Hoboken, New Jersey: Frommer's. p. 482. ISBN 978-0-470-39897-5.
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