121154153113 has 24 divisors (see below), whose sum is σ = 149301603432. Its totient is φ = 97687425024.

The previous prime is 121154153051. The next prime is 121154153117. The reversal of 121154153113 is 311351451121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23929924249 + 97224228864 = 154693^2 + 311808^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121154153113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121154153117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1623681 + ... + 1696657.

It is an arithmetic number, because the mean of its divisors is an integer number (6220900143).

Almost surely, 2^121154153113 is an apocalyptic number.

It is an amenable number.

121154153113 is a deficient number, since it is larger than the sum of its proper divisors (28147450319).

121154153113 is a wasteful number, since it uses less digits than its factorization.

121154153113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75001 (or 74994 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The spelling of 121154153113 in words is "one hundred twenty-one billion, one hundred fifty-four million, one hundred fifty-three thousand, one hundred thirteen".