13231323232221 has 32 divisors (see below), whose sum is σ = 18675332881920. Its totient is φ = 8318289470400.

The previous prime is 13231323232207. The next prime is 13231323232327. The reversal of 13231323232221 is 12223232313231.

It is not a de Polignac number, because 13231323232221 - 2²⁷ = 13231189014493 is a prime.

It is a super-2 number, since 2×13231323232221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231323232921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105474666 + ... + 105600036.

It is an arithmetic number, because the mean of its divisors is an integer number (583604152560).

Almost surely, 2^{13231323232221} is an apocalyptic number.

It is an amenable number.

13231323232221 is a deficient number, since it is larger than the sum of its proper divisors (5444009649699).

13231323232221 is a wasteful number, since it uses less digits than its factorization.

13231323232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153657.

The product of its digits is 15552, while the sum is 30.

Adding to 13231323232221 its reverse (12223232313231), we get a palindrome (25454555545452).

The spelling of 13231323232221 in words is "thirteen trillion, two hundred thirty-one billion, three hundred twenty-three million, two hundred thirty-two thousand, two hundred twenty-one".