13221002220 has 24 divisors (see below), whose sum is σ = 37018806384. Its totient is φ = 3525600576.

The previous prime is 13221002213. The next prime is 13221002273. The reversal of 13221002220 is 2220012231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13221002220.

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, 110174959 + ... + 110175078.

It is an arithmetic number, because the mean of its divisors is an integer number (1542450266).

Almost surely, 2^13221002220 is an apocalyptic number.

13221002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221002220 is an abundant number, since it is smaller than the sum of its proper divisors (23797804164).

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

13221002220 is a wasteful number, since it uses less digits than its factorization.

13221002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220350049 (or 220350047 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 13221002220 its reverse (2220012231), we get a palindrome (15441014451).

The spelling of 13221002220 in words is "thirteen billion, two hundred twenty-one million, two thousand, two hundred twenty".