12312320013 has 36 divisors (see below), whose sum is σ = 20839157820. Its totient is φ = 6984222336.

The previous prime is 12312319997. The next prime is 12312320063. The reversal of 12312320013 is 31002321321.

It can be written as a sum of positive squares in 2 ways, for example, as 3551921604 + 8760398409 = 59598^2 + 93597^2 .

It is not a de Polignac number, because 12312320013 - 2⁴ = 12312319997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312320063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41478 + ... + 162311.

It is an arithmetic number, because the mean of its divisors is an integer number (578865495).

Almost surely, 2^12312320013 is an apocalyptic number.

It is an amenable number.

12312320013 is a deficient number, since it is larger than the sum of its proper divisors (8526837807).

12312320013 is a wasteful number, since it uses less digits than its factorization.

12312320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203946 (or 203936 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12312320013 its reverse (31002321321), we get a palindrome (43314641334).

The spelling of 12312320013 in words is "twelve billion, three hundred twelve million, three hundred twenty thousand, thirteen".