12591316291 has 2 divisors, whose sum is σ = 12591316292. Its totient is φ = 12591316290.

The previous prime is 12591316289. The next prime is 12591316307. The reversal of 12591316291 is 19261319521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12591316291 - 2¹ = 12591316289 is a prime.

Together with 12591316289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12591316211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6295658145 + 6295658146.

It is an arithmetic number, because the mean of its divisors is an integer number (6295658146).

Almost surely, 2^12591316291 is an apocalyptic number.

12591316291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12591316291 is an equidigital number, since it uses as much as digits as its factorization.

12591316291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 40.

The spelling of 12591316291 in words is "twelve billion, five hundred ninety-one million, three hundred sixteen thousand, two hundred ninety-one".