13211456261491 has 2 divisors, whose sum is σ = 13211456261492. Its totient is φ = 13211456261490.

The previous prime is 13211456261449. The next prime is 13211456261513. The reversal of 13211456261491 is 19416265411231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13211456261491 - 2³⁹ = 12661700447603 is a prime.

It is not a weakly prime, because it can be changed into another prime (13211456261401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605728130745 + 6605728130746.

It is an arithmetic number, because the mean of its divisors is an integer number (6605728130746).

Almost surely, 2^{13211456261491} is an apocalyptic number.

13211456261491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211456261491 is an equidigital number, since it uses as much as digits as its factorization.

13211456261491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The spelling of 13211456261491 in words is "thirteen trillion, two hundred eleven billion, four hundred fifty-six million, two hundred sixty-one thousand, four hundred ninety-one".