13231020277 has 2 divisors, whose sum is σ = 13231020278. Its totient is φ = 13231020276.

The previous prime is 13231020241. The next prime is 13231020311. The reversal of 13231020277 is 77202013231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13230980676 + 39601 = 115026^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231020277 - 2¹⁹ = 13230495989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231020377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615510138 + 6615510139.

It is an arithmetic number, because the mean of its divisors is an integer number (6615510139).

Almost surely, 2^13231020277 is an apocalyptic number.

It is an amenable number.

13231020277 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231020277 is an equidigital number, since it uses as much as digits as its factorization.

13231020277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The spelling of 13231020277 in words is "thirteen billion, two hundred thirty-one million, twenty thousand, two hundred seventy-seven".