13221200220 has 48 divisors (see below), whose sum is σ = 39196973088. Its totient is φ = 3318261760.

The previous prime is 13221200219. The next prime is 13221200281. The reversal of 13221200220 is 2200212231.

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 13221200220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6479961 + ... + 6482000.

It is an arithmetic number, because the mean of its divisors is an integer number (816603606).

Almost surely, 2^13221200220 is an apocalyptic number.

13221200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221200220 is an abundant number, since it is smaller than the sum of its proper divisors (25975772868).

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

13221200220 is a wasteful number, since it uses less digits than its factorization.

13221200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12961990 (or 12961988 counting only the distinct ones).

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

Adding to 13221200220 its reverse (2200212231), we get a palindrome (15421412451).

The spelling of 13221200220 in words is "thirteen billion, two hundred twenty-one million, two hundred thousand, two hundred twenty".