121557107264 has 56 divisors (see below), whose sum is σ = 242837134848. Its totient is φ = 60371136000.

The previous prime is 121557107201. The next prime is 121557107297. The reversal of 121557107264 is 462701755121.

It is a super-2 number, since 2×121557107264² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5981729 + ... + 6002015.

It is an arithmetic number, because the mean of its divisors is an integer number (4336377408).

Almost surely, 2^121557107264 is an apocalyptic number.

It is an amenable number.

121557107264 is a deficient number, since it is larger than the sum of its proper divisors (121280027584).

121557107264 is a wasteful number, since it uses less digits than its factorization.

121557107264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20923 (or 20913 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 121557107264 in words is "one hundred twenty-one billion, five hundred fifty-seven million, one hundred seven thousand, two hundred sixty-four".