121402725111 has 6 divisors (see below), whose sum is σ = 175359491840. Its totient is φ = 80935150068.

The previous prime is 121402725077. The next prime is 121402725151. The reversal of 121402725111 is 111527204121.

121402725111 is a `hidden beast` number, since 1 + 2 + 1 + 402 + 7 + 251 + 1 + 1 = 666.

It is not a de Polignac number, because 121402725111 - 2²⁷ = 121268507383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121402725151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6744595831 + ... + 6744595848.

Almost surely, 2^121402725111 is an apocalyptic number.

121402725111 is a deficient number, since it is larger than the sum of its proper divisors (53956766729).

121402725111 is a wasteful number, since it uses less digits than its factorization.

121402725111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13489191685 (or 13489191682 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

Adding to 121402725111 its reverse (111527204121), we get a palindrome (232929929232).

The spelling of 121402725111 in words is "one hundred twenty-one billion, four hundred two million, seven hundred twenty-five thousand, one hundred eleven".