13121313022091 has 4 divisors (see below), whose sum is σ = 13193806464384. Its totient is φ = 13048819579800.

The previous prime is 13121313022087. The next prime is 13121313022099. The reversal of 13121313022091 is 19022031312131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13121313022091 - 2² = 13121313022087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121313022099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36246720875 + ... + 36246721236.

It is an arithmetic number, because the mean of its divisors is an integer number (3298451616096).

Almost surely, 2^{13121313022091} is an apocalyptic number.

13121313022091 is a deficient number, since it is larger than the sum of its proper divisors (72493442293).

13121313022091 is an equidigital number, since it uses as much as digits as its factorization.

13121313022091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72493442292.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 13121313022091 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirteen million, twenty-two thousand, ninety-one".