12513521051 has 4 divisors (see below), whose sum is σ = 12513798504. Its totient is φ = 12513243600.

The previous prime is 12513521021. The next prime is 12513521159. The reversal of 12513521051 is 15012531521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15012531521 = 13 ⋅1154810117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12513521051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12513521051.

It is not an unprimeable number, because it can be changed into a prime (12513521021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53705 + ... + 167066.

It is an arithmetic number, because the mean of its divisors is an integer number (3128449626).

Almost surely, 2^12513521051 is an apocalyptic number.

12513521051 is a deficient number, since it is larger than the sum of its proper divisors (277453).

12513521051 is an equidigital number, since it uses as much as digits as its factorization.

12513521051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277452.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 12513521051 in words is "twelve billion, five hundred thirteen million, five hundred twenty-one thousand, fifty-one".