12513222521 has 16 divisors (see below), whose sum is σ = 13996359360. Its totient is φ = 11117514240.

The previous prime is 12513222479. The next prime is 12513222577. The reversal of 12513222521 is 12522231521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12513222521 - 2³⁰ = 11439480697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12513122521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21830 + ... + 159696.

It is an arithmetic number, because the mean of its divisors is an integer number (874772460).

Almost surely, 2^12513222521 is an apocalyptic number.

It is an amenable number.

12513222521 is a deficient number, since it is larger than the sum of its proper divisors (1483136839).

12513222521 is a wasteful number, since it uses less digits than its factorization.

12513222521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138184.

The product of its digits is 2400, while the sum is 26.

The spelling of 12513222521 in words is "twelve billion, five hundred thirteen million, two hundred twenty-two thousand, five hundred twenty-one".