13531322120 has 16 divisors (see below), whose sum is σ = 30445474860. Its totient is φ = 5412528832.

The previous prime is 13531322111. The next prime is 13531322171. The reversal of 13531322120 is 2122313531.

It can be written as a sum of positive squares in 2 ways, for example, as 12796586884 + 734735236 = 113122^2 + 27106^2 .

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, 169141487 + ... + 169141566.

Almost surely, 2^13531322120 is an apocalyptic number.

13531322120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531322120 is an abundant number, since it is smaller than the sum of its proper divisors (16914152740).

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

13531322120 is a wasteful number, since it uses less digits than its factorization.

13531322120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338283064 (or 338283060 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 13531322120 its reverse (2122313531), we get a palindrome (15653635651).

The spelling of 13531322120 in words is "thirteen billion, five hundred thirty-one million, three hundred twenty-two thousand, one hundred twenty".