13121132312320 has 36 divisors (see below), whose sum is σ = 31429212244920. Its totient is φ = 5248452924416.

The previous prime is 13121132312269. The next prime is 13121132312329. The reversal of 13121132312320 is 2321323112131.

It is a super-2 number, since 2×13121132312320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121132312329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125441030 + ... + 5125443589.

It is an arithmetic number, because the mean of its divisors is an integer number (873033673470).

Almost surely, 2^{13121132312320} is an apocalyptic number.

13121132312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121132312320 is an abundant number, since it is smaller than the sum of its proper divisors (18308079932600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121132312320 is an equidigital number, since it uses as much as digits as its factorization.

13121132312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250884640 (or 10250884626 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13121132312320 its reverse (2321323112131), we get a palindrome (15442455424451).

The spelling of 13121132312320 in words is "thirteen trillion, one hundred twenty-one billion, one hundred thirty-two million, three hundred twelve thousand, three hundred twenty".