13121332389791 has 8 divisors (see below), whose sum is σ = 13576227929280. Its totient is φ = 12666599237152.

The previous prime is 13121332389757. The next prime is 13121332389829. The reversal of 13121332389791 is 19798323312131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13121332389791 - 2⁶ = 13121332389727 is a prime.

It is a super-2 number, since 2×13121332389791² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121332389391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40432295 + ... + 40755528.

It is an arithmetic number, because the mean of its divisors is an integer number (1697028491160).

Almost surely, 2^{13121332389791} is an apocalyptic number.

13121332389791 is a deficient number, since it is larger than the sum of its proper divisors (454895539489).

13121332389791 is an equidigital number, since it uses as much as digits as its factorization.

13121332389791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81193425.

The product of its digits is 1469664, while the sum is 53.

The spelling of 13121332389791 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirty-two million, three hundred eighty-nine thousand, seven hundred ninety-one".