13221502220 has 12 divisors (see below), whose sum is σ = 27765154704. Its totient is φ = 5288600880.

The previous prime is 13221502213. The next prime is 13221502267. The reversal of 13221502220 is 2220512231.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 661075111 = 13221502220 / (1 + 3 + 2 + 2 + 1 + 5 + 0 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 13221502192 and 13221502201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330537536 + ... + 330537575.

It is an arithmetic number, because the mean of its divisors is an integer number (2313762892).

Almost surely, 2^13221502220 is an apocalyptic number.

13221502220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221502220 is an abundant number, since it is smaller than the sum of its proper divisors (14543652484).

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

13221502220 is a wasteful number, since it uses less digits than its factorization.

13221502220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661075120 (or 661075118 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The spelling of 13221502220 in words is "thirteen billion, two hundred twenty-one million, five hundred two thousand, two hundred twenty".