12317312491 has 36 divisors (see below), whose sum is σ = 14161627200. Its totient is φ = 10693900800.

The previous prime is 12317312479. The next prime is 12317312561. The reversal of 12317312491 is 19421371321.

It is a happy number.

It is not a de Polignac number, because 12317312491 - 2¹⁹ = 12316788203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12317312401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35292985 + ... + 35293333.

Almost surely, 2^12317312491 is an apocalyptic number.

12317312491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12317312491 is a deficient number, since it is larger than the sum of its proper divisors (1844314709).

12317312491 is an equidigital number, since it uses as much as digits as its factorization.

12317312491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 488 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The spelling of 12317312491 in words is "twelve billion, three hundred seventeen million, three hundred twelve thousand, four hundred ninety-one".