12312300991 has 2 divisors, whose sum is σ = 12312300992. Its totient is φ = 12312300990.

The previous prime is 12312300989. The next prime is 12312301063. The reversal of 12312300991 is 19900321321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12312300991 - 2¹ = 12312300989 is a prime.

Together with 12312300989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312300911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156150495 + 6156150496.

It is an arithmetic number, because the mean of its divisors is an integer number (6156150496).

Almost surely, 2^12312300991 is an apocalyptic number.

12312300991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312300991 is an equidigital number, since it uses as much as digits as its factorization.

12312300991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 12312300991 in words is "twelve billion, three hundred twelve million, three hundred thousand, nine hundred ninety-one".