121716902319193 has 16 divisors (see below), whose sum is σ = 124667418353920. Its totient is φ = 118800565228800.

The previous prime is 121716902319191. The next prime is 121716902319263. The reversal of 121716902319193 is 391913209617121.

It is a cyclic number.

It is not a de Polignac number, because 121716902319193 - 2¹ = 121716902319191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121716902319191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9693153 + ... + 18368206.

It is an arithmetic number, because the mean of its divisors is an integer number (7791713647120).

Almost surely, 2^{121716902319193} is an apocalyptic number.

It is an amenable number.

121716902319193 is a deficient number, since it is larger than the sum of its proper divisors (2950516034727).

121716902319193 is a wasteful number, since it uses less digits than its factorization.

121716902319193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28061968.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 121716902319193 in words is "one hundred twenty-one trillion, seven hundred sixteen billion, nine hundred two million, three hundred nineteen thousand, one hundred ninety-three".