13221002221 has 16 divisors (see below), whose sum is σ = 16022392704. Its totient is φ = 10649769984.

The previous prime is 13221002213. The next prime is 13221002273. The reversal of 13221002221 is 12220012231.

It is a happy number.

13221002221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13221002221 - 2³ = 13221002213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221002195 and 13221002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221002281) 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, 2455 + ... + 162628.

It is an arithmetic number, because the mean of its divisors is an integer number (1001399544).

Almost surely, 2^13221002221 is an apocalyptic number.

It is an amenable number.

13221002221 is a deficient number, since it is larger than the sum of its proper divisors (2801390483).

13221002221 is a wasteful number, since it uses less digits than its factorization.

13221002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165780.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13221002221 its reverse (12220012231), we get a palindrome (25441014452).

The spelling of 13221002221 in words is "thirteen billion, two hundred twenty-one million, two thousand, two hundred twenty-one".