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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.
φ(122) = φ(σ(122)).[1]
In other fields
- The atomic number of the chemical element unbibium
- The emergency telephone number in several countries
- 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
- ^ Sloane, N. J. A. (ed.). "Sequence A006872". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.