13221013020 has 48 divisors (see below), whose sum is σ = 37114066080. Its totient is φ = 3516534016.

The previous prime is 13221012941. The next prime is 13221013027. The reversal of 13221013020 is 2031012231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221013027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259887 + ... + 306566.

It is an arithmetic number, because the mean of its divisors is an integer number (773209710).

Almost surely, 2^13221013020 is an apocalyptic number.

13221013020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221013020 is an abundant number, since it is smaller than the sum of its proper divisors (23893053060).

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

13221013020 is a wasteful number, since it uses less digits than its factorization.

13221013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566854 (or 566852 counting only the distinct ones).

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

Adding to 13221013020 its reverse (2031012231), we get a palindrome (15252025251).

The spelling of 13221013020 in words is "thirteen billion, two hundred twenty-one million, thirteen thousand, twenty".