13321012120 has 64 divisors (see below), whose sum is σ = 33681251520. Its totient is φ = 4704674304.

The previous prime is 13321012091. The next prime is 13321012121. The reversal of 13321012120 is 2121012331.

It is a junction number, because it is equal to n+sod(n) for n = 13321012094 and 13321012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321012121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544939 + ... + 568858.

It is an arithmetic number, because the mean of its divisors is an integer number (526269555).

Almost surely, 2^13321012120 is an apocalyptic number.

13321012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13321012120 is an abundant number, since it is smaller than the sum of its proper divisors (20360239400).

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

13321012120 is a wasteful number, since it uses less digits than its factorization.

13321012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113844 (or 1113840 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13321012120 its reverse (2121012331), we get a palindrome (15442024451).

The spelling of 13321012120 in words is "thirteen billion, three hundred twenty-one million, twelve thousand, one hundred twenty".