12331231291 has 2 divisors, whose sum is σ = 12331231292. Its totient is φ = 12331231290.

The previous prime is 12331231267. The next prime is 12331231331. The reversal of 12331231291 is 19213213321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12331231291 - 2¹⁷ = 12331100219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12331231091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165615645 + 6165615646.

It is an arithmetic number, because the mean of its divisors is an integer number (6165615646).

Almost surely, 2^12331231291 is an apocalyptic number.

12331231291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331231291 is an equidigital number, since it uses as much as digits as its factorization.

12331231291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The spelling of 12331231291 in words is "twelve billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred ninety-one".