13121310120 has 32 divisors (see below), whose sum is σ = 39363930720. Its totient is φ = 3499016000.

The previous prime is 13121310053. The next prime is 13121310143. The reversal of 13121310120 is 2101312131.

It is a happy number.

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 13121310120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54672006 + ... + 54672245.

It is an arithmetic number, because the mean of its divisors is an integer number (1230122835).

Almost surely, 2^13121310120 is an apocalyptic number.

13121310120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121310120 is an abundant number, since it is smaller than the sum of its proper divisors (26242620600).

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

13121310120 is a wasteful number, since it uses less digits than its factorization.

13121310120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109344265 (or 109344261 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13121310120 its reverse (2101312131), we get a palindrome (15222622251).

The spelling of 13121310120 in words is "thirteen billion, one hundred twenty-one million, three hundred ten thousand, one hundred twenty".