122

Number

$122$ (one hundred and twenty-two) is:

$2 \times 61$

The $16$th nontotient after $14$, $26$, $34$, $38$, $50$, $62$, $68$, $74$, $76$, $86$, $90$, $94$, $98$, $114$, $118$:

$\nexists m \in \Z_{>0}: \phi \left({m}\right) = 122$

where $\phi \left({m}\right)$ denotes the Euler $\phi$ function

The $10$th noncototient after $10$, $26$, $34$, $50$, $52$, $58$, $86$, $100$, $116$:

$\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 122$

where $\phi \left({m}\right)$ denotes the Euler $\phi$ function

The $2$nd even integer that cannot be expressed as the sum of $2$ prime numbers of which the smaller one is $3$, $5$ or $7$.

The $23$rd positive integer $n$ such that no factorial of an integer can end with $n$ zeroes.