13203203221 has 16 divisors (see below), whose sum is σ = 15065964144. Its totient is φ = 11462482944.

The previous prime is 13203203207. The next prime is 13203203243. The reversal of 13203203221 is 12230230231.

13203203221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1671664996 + 11531538225 = 40886^2 + 107385^2 .

It is a cyclic number.

It is not a de Polignac number, because 13203203221 - 2²⁹ = 12666332309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13203203281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300555 + ... + 341671.

It is an arithmetic number, because the mean of its divisors is an integer number (941622759).

Almost surely, 2^13203203221 is an apocalyptic number.

It is an amenable number.

13203203221 is a deficient number, since it is larger than the sum of its proper divisors (1862760923).

13203203221 is a wasteful number, since it uses less digits than its factorization.

13203203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42600.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 13203203221 its reverse (12230230231), we get a palindrome (25433433452).

The spelling of 13203203221 in words is "thirteen billion, two hundred three million, two hundred three thousand, two hundred twenty-one".