13521010120 has 32 divisors (see below), whose sum is σ = 30498939000. Its totient is φ = 5394774528.

The previous prime is 13521010099. The next prime is 13521010177. The reversal of 13521010120 is 2101012531.

It can be written as a sum of positive squares in 4 ways, for example, as 9853738756 + 3667271364 = 99266^2 + 60558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13521010094 and 13521010103.

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, 409845 + ... + 441604.

Almost surely, 2^13521010120 is an apocalyptic number.

13521010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13521010120 is an abundant number, since it is smaller than the sum of its proper divisors (16977928880).

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

13521010120 is a wasteful number, since it uses less digits than its factorization.

13521010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851857 (or 851853 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 13521010120 its reverse (2101012531), we get a palindrome (15622022651).

The spelling of 13521010120 in words is "thirteen billion, five hundred twenty-one million, ten thousand, one hundred twenty".