13261531521311 has 2 divisors, whose sum is σ = 13261531521312. Its totient is φ = 13261531521310.

The previous prime is 13261531521257. The next prime is 13261531521367. The reversal of 13261531521311 is 11312513516231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13261531521311 - 2⁶ = 13261531521247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13261531521911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630765760655 + 6630765760656.

It is an arithmetic number, because the mean of its divisors is an integer number (6630765760656).

Almost surely, 2^{13261531521311} is an apocalyptic number.

13261531521311 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261531521311 is an equidigital number, since it uses as much as digits as its factorization.

13261531521311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The spelling of 13261531521311 in words is "thirteen trillion, two hundred sixty-one billion, five hundred thirty-one million, five hundred twenty-one thousand, three hundred eleven".