13233220221 has 8 divisors (see below), whose sum is σ = 19001547040. Its totient is φ = 8143520112.

The previous prime is 13233220211. The next prime is 13233220249. The reversal of 13233220221 is 12202233231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13233220221 - 2¹⁹ = 13232695933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13233220211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169656631 + ... + 169656708.

It is an arithmetic number, because the mean of its divisors is an integer number (2375193380).

Almost surely, 2^13233220221 is an apocalyptic number.

It is an amenable number.

13233220221 is a deficient number, since it is larger than the sum of its proper divisors (5768326819).

13233220221 is a wasteful number, since it uses less digits than its factorization.

13233220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339313355.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 13233220221 its reverse (12202233231), we get a palindrome (25435453452).

The spelling of 13233220221 in words is "thirteen billion, two hundred thirty-three million, two hundred twenty thousand, two hundred twenty-one".