13313211220 has 12 divisors (see below), whose sum is σ = 27957743604. Its totient is φ = 5325284480.

The previous prime is 13313211181. The next prime is 13313211269. The reversal of 13313211220 is 2211231331.

It can be written as a sum of positive squares in 2 ways, for example, as 9913388356 + 3399822864 = 99566^2 + 58308^2 .

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, 332830261 + ... + 332830300.

It is an arithmetic number, because the mean of its divisors is an integer number (2329811967).

Almost surely, 2^13313211220 is an apocalyptic number.

13313211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13313211220 is an abundant number, since it is smaller than the sum of its proper divisors (14644532384).

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

13313211220 is a wasteful number, since it uses less digits than its factorization.

13313211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665660570 (or 665660568 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13313211220 its reverse (2211231331), we get a palindrome (15524442551).

The spelling of 13313211220 in words is "thirteen billion, three hundred thirteen million, two hundred eleven thousand, two hundred twenty".