13021320120 has 64 divisors (see below), whose sum is σ = 39161521440. Its totient is φ = 3463680000.

The previous prime is 13021320113. The next prime is 13021320121. The reversal of 13021320120 is 2102312031.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13021320120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021320121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87181 + ... + 183420.

Almost surely, 2^13021320120 is an apocalyptic number.

13021320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021320120 is an abundant number, since it is smaller than the sum of its proper divisors (26140201320).

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

13021320120 is a wasteful number, since it uses less digits than its factorization.

13021320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271016 (or 271012 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 13021320120 its reverse (2102312031), we get a palindrome (15123632151).

The spelling of 13021320120 in words is "thirteen billion, twenty-one million, three hundred twenty thousand, one hundred twenty".