12135515015 has 32 divisors (see below), whose sum is σ = 16247589120. Its totient is φ = 8639801856.

The previous prime is 12135514987. The next prime is 12135515027. The reversal of 12135515015 is 51051553121.

12135515015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12135515015 - 2⁸ = 12135514759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1377314 + ... + 1386096.

It is an arithmetic number, because the mean of its divisors is an integer number (507737160).

Almost surely, 2^12135515015 is an apocalyptic number.

12135515015 is a deficient number, since it is larger than the sum of its proper divisors (4112074105).

12135515015 is a wasteful number, since it uses less digits than its factorization.

12135515015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9563.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 12135515015 in words is "twelve billion, one hundred thirty-five million, five hundred fifteen thousand, fifteen".