13221100320 has 48 divisors (see below), whose sum is σ = 41646467520. Its totient is φ = 3525626624.

The previous prime is 13221100267. The next prime is 13221100339. The reversal of 13221100320 is 2300112231.

It is a tau number, because it is divible by the number of its divisors (48).

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 13221100320.

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, 13771500 + ... + 13772459.

It is an arithmetic number, because the mean of its divisors is an integer number (867634740).

Almost surely, 2^13221100320 is an apocalyptic number.

13221100320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221100320 is an abundant number, since it is smaller than the sum of its proper divisors (28425367200).

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

13221100320 is a wasteful number, since it uses less digits than its factorization.

13221100320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27543977 (or 27543969 counting only the distinct ones).

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

Adding to 13221100320 its reverse (2300112231), we get a palindrome (15521212551).

The spelling of 13221100320 in words is "thirteen billion, two hundred twenty-one million, one hundred thousand, three hundred twenty".