121711665051 has 12 divisors (see below), whose sum is σ = 175841658928. Its totient is φ = 81124531344.

The previous prime is 121711665041. The next prime is 121711665151. The reversal of 121711665051 is 150566117121.

121711665051 is a `hidden beast` number, since 1 + 21 + 71 + 1 + 66 + 505 + 1 = 666.

It is not a de Polignac number, because 121711665051 - 2²² = 121707470747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121711664997 and 121711665015.

It is not an unprimeable number, because it can be changed into a prime (121711665041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334980 + ... + 1423233.

Almost surely, 2^121711665051 is an apocalyptic number.

121711665051 is a deficient number, since it is larger than the sum of its proper divisors (54129993877).

121711665051 is a wasteful number, since it uses less digits than its factorization.

121711665051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763122 (or 2763119 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The spelling of 121711665051 in words is "one hundred twenty-one billion, seven hundred eleven million, six hundred sixty-five thousand, fifty-one".