13102131220 has 12 divisors (see below), whose sum is σ = 27514475604. Its totient is φ = 5240852480.

The previous prime is 13102131209. The next prime is 13102131223. The reversal of 13102131220 is 2213120131.

It can be written as a sum of positive squares in 2 ways, for example, as 7000334224 + 6101796996 = 83668^2 + 78114^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13102131194 and 13102131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13102131223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327553261 + ... + 327553300.

It is an arithmetic number, because the mean of its divisors is an integer number (2292872967).

Almost surely, 2^13102131220 is an apocalyptic number.

13102131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13102131220 is an abundant number, since it is smaller than the sum of its proper divisors (14412344384).

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

13102131220 is a wasteful number, since it uses less digits than its factorization.

13102131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655106570 (or 655106568 counting only the distinct ones).

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

Adding to 13102131220 its reverse (2213120131), we get a palindrome (15315251351).

The spelling of 13102131220 in words is "thirteen billion, one hundred two million, one hundred thirty-one thousand, two hundred twenty".