13121432120 has 16 divisors (see below), whose sum is σ = 29523222360. Its totient is φ = 5248572832.

The previous prime is 13121432119. The next prime is 13121432141. The reversal of 13121432120 is 2123412131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13121432092 and 13121432101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164017862 + ... + 164017941.

Almost surely, 2^13121432120 is an apocalyptic number.

13121432120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121432120 is an abundant number, since it is smaller than the sum of its proper divisors (16401790240).

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

13121432120 is a wasteful number, since it uses less digits than its factorization.

13121432120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328035814 (or 328035810 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13121432120 its reverse (2123412131), we get a palindrome (15244844251).

The spelling of 13121432120 in words is "thirteen billion, one hundred twenty-one million, four hundred thirty-two thousand, one hundred twenty".