13221210204 has 48 divisors (see below), whose sum is σ = 34439722240. Its totient is φ = 4386175920.

The previous prime is 13221210203. The next prime is 13221210217. The reversal of 13221210204 is 40201212231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221210203) 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, 267304 + ... + 312879.

Almost surely, 2^13221210204 is an apocalyptic number.

It is an amenable number.

13221210204 is an abundant number, since it is smaller than the sum of its proper divisors (21218512036).

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

13221210204 is a wasteful number, since it uses less digits than its factorization.

13221210204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580407 (or 580399 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 13221210204 its reverse (40201212231), we get a palindrome (53422422435).

The spelling of 13221210204 in words is "thirteen billion, two hundred twenty-one million, two hundred ten thousand, two hundred four".