12913358521 has 12 divisors (see below), whose sum is σ = 15062613888. Its totient is φ = 11038417992.

The previous prime is 12913358503. The next prime is 12913358561. The reversal of 12913358521 is 12585331921.

It is not a de Polignac number, because 12913358521 - 2⁹ = 12913358009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12913358561) 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, 341061 + ... + 377026.

It is an arithmetic number, because the mean of its divisors is an integer number (1255217824).

Almost surely, 2^12913358521 is an apocalyptic number.

It is an amenable number.

12913358521 is a deficient number, since it is larger than the sum of its proper divisors (2149255367).

12913358521 is an equidigital number, since it uses as much as digits as its factorization.

12913358521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718468 (or 718461 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The spelling of 12913358521 in words is "twelve billion, nine hundred thirteen million, three hundred fifty-eight thousand, five hundred twenty-one".