15115354121 has 16 divisors (see below), whose sum is σ = 17543361024. Its totient is φ = 12755902464.

The previous prime is 15115354049. The next prime is 15115354123. The reversal of 15115354121 is 12145351151.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15115354121 - 2¹⁴ = 15115337737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15115354123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73376 + ... + 188718.

It is an arithmetic number, because the mean of its divisors is an integer number (1096460064).

Almost surely, 2^15115354121 is an apocalyptic number.

It is an amenable number.

15115354121 is a deficient number, since it is larger than the sum of its proper divisors (2428006903).

15115354121 is a wasteful number, since it uses less digits than its factorization.

15115354121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115640.

The product of its digits is 3000, while the sum is 29.

The spelling of 15115354121 in words is "fifteen billion, one hundred fifteen million, three hundred fifty-four thousand, one hundred twenty-one".