121152111129 has 32 divisors (see below), whose sum is σ = 205320775680. Its totient is φ = 69163794000.

The previous prime is 121152111121. The next prime is 121152111131. The reversal of 121152111129 is 921111251121.

121152111129 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 521 + 11 + 129 = 666.

It is not a de Polignac number, because 121152111129 - 2³ = 121152111121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121152111121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106317 + ... + 503594.

It is an arithmetic number, because the mean of its divisors is an integer number (6416274240).

Almost surely, 2^121152111129 is an apocalyptic number.

It is an amenable number.

121152111129 is a deficient number, since it is larger than the sum of its proper divisors (84168664551).

121152111129 is a wasteful number, since it uses less digits than its factorization.

121152111129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610978 (or 610972 counting only the distinct ones).

The product of its digits is 360, while the sum is 27.

The spelling of 121152111129 in words is "one hundred twenty-one billion, one hundred fifty-two million, one hundred eleven thousand, one hundred twenty-nine".