12513435123 has 24 divisors (see below), whose sum is σ = 20550279312. Its totient is φ = 6729913344.

The previous prime is 12513435013. The next prime is 12513435173. The reversal of 12513435123 is 32153431521.

It is not a de Polignac number, because 12513435123 - 2⁸ = 12513434867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12513435173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2501190 + ... + 2506187.

It is an arithmetic number, because the mean of its divisors is an integer number (856261638).

Almost surely, 2^12513435123 is an apocalyptic number.

12513435123 is a deficient number, since it is larger than the sum of its proper divisors (8036844189).

12513435123 is a wasteful number, since it uses less digits than its factorization.

12513435123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007411 (or 5007404 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

Adding to 12513435123 its reverse (32153431521), we get a palindrome (44666866644).

The spelling of 12513435123 in words is "twelve billion, five hundred thirteen million, four hundred thirty-five thousand, one hundred twenty-three".