13221510320 has 40 divisors (see below), whose sum is σ = 30751302624. Its totient is φ = 5286661632.

The previous prime is 13221510307. The next prime is 13221510377. The reversal of 13221510320 is 2301512231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13221510292 and 13221510301.

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, 199637 + ... + 257483.

Almost surely, 2^13221510320 is an apocalyptic number.

13221510320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221510320 is an abundant number, since it is smaller than the sum of its proper divisors (17529792304).

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

13221510320 is a wasteful number, since it uses less digits than its factorization.

13221510320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60717 (or 60711 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 13221510320 in words is "thirteen billion, two hundred twenty-one million, five hundred ten thousand, three hundred twenty".