121152155049 has 12 divisors (see below), whose sum is σ = 176603040900. Its totient is φ = 80027110944.

The previous prime is 121152155021. The next prime is 121152155071. The reversal of 121152155049 is 940551251121.

121152155049 is a `hidden beast` number, since 1 + 2 + 11 + 52 + 1 + 550 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98035993449 + 23116161600 = 313107^2 + 152040^2 .

It is not a de Polignac number, because 121152155049 - 2²³ = 121143766441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121152155249) 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, 61748334 + ... + 61750295.

It is an arithmetic number, because the mean of its divisors is an integer number (14716920075).

Almost surely, 2^121152155049 is an apocalyptic number.

It is an amenable number.

121152155049 is a deficient number, since it is larger than the sum of its proper divisors (55450885851).

121152155049 is a wasteful number, since it uses less digits than its factorization.

121152155049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123498744 (or 123498741 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 121152155049 in words is "one hundred twenty-one billion, one hundred fifty-two million, one hundred fifty-five thousand, forty-nine".