12320402291 has 2 divisors, whose sum is σ = 12320402292. Its totient is φ = 12320402290.

The previous prime is 12320402273. The next prime is 12320402327. The reversal of 12320402291 is 19220402321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320402291 is a prime.

It is a super-2 number, since 2×12320402291² (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 12320402291.

It is not a weakly prime, because it can be changed into another prime (12320402201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160201145 + 6160201146.

It is an arithmetic number, because the mean of its divisors is an integer number (6160201146).

Almost surely, 2^12320402291 is an apocalyptic number.

12320402291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320402291 is an equidigital number, since it uses as much as digits as its factorization.

12320402291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 12320402291 in words is "twelve billion, three hundred twenty million, four hundred two thousand, two hundred ninety-one".