13021311320 has 64 divisors (see below), whose sum is σ = 29838313440. Its totient is φ = 5112806400.

The previous prime is 13021311293. The next prime is 13021311389. The reversal of 13021311320 is 2311312031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266119 + ... + 1276361.

Almost surely, 2^13021311320 is an apocalyptic number.

13021311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13021311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14919156720).

13021311320 is an abundant number, since it is smaller than the sum of its proper divisors (16817002120).

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

13021311320 is a wasteful number, since it uses less digits than its factorization.

13021311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10836 (or 10832 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13021311320 its reverse (2311312031), we get a palindrome (15332623351).

The spelling of 13021311320 in words is "thirteen billion, twenty-one million, three hundred eleven thousand, three hundred twenty".