12312322091 has 2 divisors, whose sum is σ = 12312322092. Its totient is φ = 12312322090.

The previous prime is 12312322081. The next prime is 12312322129. The reversal of 12312322091 is 19022321321.

It is a weak prime.

It is an emirp because it is prime and its reverse (19022321321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12312322091 - 2²² = 12308127787 is a prime.

It is a super-2 number, since 2×12312322091² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12312322091.

It is not a weakly prime, because it can be changed into another prime (12312322051) 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 as a sum of consecutive naturals, namely, 6156161045 + 6156161046.

It is an arithmetic number, because the mean of its divisors is an integer number (6156161046).

Almost surely, 2^12312322091 is an apocalyptic number.

12312322091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312322091 is an equidigital number, since it uses as much as digits as its factorization.

12312322091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 12312322091 in words is "twelve billion, three hundred twelve million, three hundred twenty-two thousand, ninety-one".