121512628136 has 8 divisors (see below), whose sum is σ = 227836177770. Its totient is φ = 60756314064.

The previous prime is 121512628123. The next prime is 121512628151. The reversal of 121512628136 is 631826215121.

It can be written as a sum of positive squares in only one way, i.e., 114115596100 + 7397032036 = 337810^2 + 86006^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 121512628136.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7594539251 + ... + 7594539266.

Almost surely, 2^121512628136 is an apocalyptic number.

It is an amenable number.

121512628136 is a deficient number, since it is larger than the sum of its proper divisors (106323549634).

121512628136 is a wasteful number, since it uses less digits than its factorization.

121512628136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189078523 (or 15189078519 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The spelling of 121512628136 in words is "one hundred twenty-one billion, five hundred twelve million, six hundred twenty-eight thousand, one hundred thirty-six".