13221203100 has 72 divisors (see below), whose sum is σ = 43718118528. Its totient is φ = 3021988800.

The previous prime is 13221203087. The next prime is 13221203117. The reversal of 13221203100 is 130212231.

It is a super-2 number, since 2×13221203100² (a number of 21 digits) contains 22 as substring.

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 13221203100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3145806 + ... + 3150005.

Almost surely, 2^13221203100 is an apocalyptic number.

13221203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221203100 is an abundant number, since it is smaller than the sum of its proper divisors (30496915428).

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

13221203100 is a wasteful number, since it uses less digits than its factorization.

13221203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6295835 (or 6295828 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 13221203100 its reverse (130212231), we get a palindrome (13351415331).

The spelling of 13221203100 in words is "thirteen billion, two hundred twenty-one million, two hundred three thousand, one hundred".