122

This number is a composite.

122 squared minus each of its prime factors squared is also prime. [Sladcik]

122 is the smallest sum of two non-consecutive factorials of distinct primes (2! + 5!). [Gevisier]

The smallest dihedral semiprime in which all four associated semiprimes are distinct. Note that it contains the smallest dihedral semiprime (22) and also the smallest dihedral prime (2). [Capelle]

There are no twin primes between 122 squared and the next consecutive square. [Kremer and Rosenthal]