12312431251 has 2 divisors, whose sum is σ = 12312431252. Its totient is φ = 12312431250.

The previous prime is 12312431249. The next prime is 12312431269. The reversal of 12312431251 is 15213421321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12312431251 - 2¹ = 12312431249 is a prime.

Together with 12312431249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12312431051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156215625 + 6156215626.

It is an arithmetic number, because the mean of its divisors is an integer number (6156215626).

Almost surely, 2^12312431251 is an apocalyptic number.

12312431251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312431251 is an equidigital number, since it uses as much as digits as its factorization.

12312431251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

Adding to 12312431251 its reverse (15213421321), we get a palindrome (27525852572).

The spelling of 12312431251 in words is "twelve billion, three hundred twelve million, four hundred thirty-one thousand, two hundred fifty-one".