13223100221 has 4 divisors (see below), whose sum is σ = 13472592732. Its totient is φ = 12973607712.

The previous prime is 13223100203. The next prime is 13223100227. The reversal of 13223100221 is 12200132231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5717476996 + 7505623225 = 75614^2 + 86635^2 .

It is a cyclic number.

It is not a de Polignac number, because 13223100221 - 2²⁶ = 13155991357 is a prime.

It is a super-2 number, since 2×13223100221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13223100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223100227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124746176 + ... + 124746281.

It is an arithmetic number, because the mean of its divisors is an integer number (3368148183).

Almost surely, 2^13223100221 is an apocalyptic number.

It is an amenable number.

13223100221 is a deficient number, since it is larger than the sum of its proper divisors (249492511).

13223100221 is an equidigital number, since it uses as much as digits as its factorization.

13223100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249492510.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13223100221 its reverse (12200132231), we get a palindrome (25423232452).

The spelling of 13223100221 in words is "thirteen billion, two hundred twenty-three million, one hundred thousand, two hundred twenty-one".