12956899231313 has 4 divisors (see below), whose sum is σ = 12956913851748. Its totient is φ = 12956884610880.

The previous prime is 12956899231249. The next prime is 12956899231321. The reversal of 12956899231313 is 31313299865921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7461381791809 + 5495517439504 = 2731553^2 + 2344252^2 .

It is a cyclic number.

It is not a de Polignac number, because 12956899231313 - 2⁶ = 12956899231249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12956899231363) 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, 5888756 + ... + 7784037.

It is an arithmetic number, because the mean of its divisors is an integer number (3239228462937).

Almost surely, 2^{12956899231313} is an apocalyptic number.

It is an amenable number.

12956899231313 is a deficient number, since it is larger than the sum of its proper divisors (14620435).

12956899231313 is an equidigital number, since it uses as much as digits as its factorization.

12956899231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14620434.

The product of its digits is 18895680, while the sum is 62.

The spelling of 12956899231313 in words is "twelve trillion, nine hundred fifty-six billion, eight hundred ninety-nine million, two hundred thirty-one thousand, three hundred thirteen".