121515797164 has 12 divisors (see below), whose sum is σ = 213007662000. Its totient is φ = 60656465168.

The previous prime is 121515797159. The next prime is 121515797177. The reversal of 121515797164 is 461797515121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25355659 + ... + 25360450.

It is an arithmetic number, because the mean of its divisors is an integer number (17750638500).

Almost surely, 2^121515797164 is an apocalyptic number.

It is an amenable number.

121515797164 is a deficient number, since it is larger than the sum of its proper divisors (91491864836).

121515797164 is a wasteful number, since it uses less digits than its factorization.

121515797164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50716712 (or 50716710 counting only the distinct ones).

The product of its digits is 529200, while the sum is 49.

The spelling of 121515797164 in words is "one hundred twenty-one billion, five hundred fifteen million, seven hundred ninety-seven thousand, one hundred sixty-four".