13231211291 has 2 divisors, whose sum is σ = 13231211292. Its totient is φ = 13231211290.

The previous prime is 13231211269. The next prime is 13231211347. The reversal of 13231211291 is 19211213231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13231211291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13231211291.

It is not a weakly prime, because it can be changed into another prime (13231241291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615605645 + 6615605646.

It is an arithmetic number, because the mean of its divisors is an integer number (6615605646).

Almost surely, 2^13231211291 is an apocalyptic number.

13231211291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231211291 is an equidigital number, since it uses as much as digits as its factorization.

13231211291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The spelling of 13231211291 in words is "thirteen billion, two hundred thirty-one million, two hundred eleven thousand, two hundred ninety-one".