232001211221 has 16 divisors (see below), whose sum is σ = 254752881600. Its totient is φ = 209969480448.

The previous prime is 232001211217. The next prime is 232001211227. The reversal of 232001211221 is 122112100232.

It is not a de Polignac number, because 232001211221 - 2² = 232001211217 is a prime.

It is a super-2 number, since 2×232001211221² (a number of 24 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 232001211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232001211227) 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, 108356 + ... + 689741.

It is an arithmetic number, because the mean of its divisors is an integer number (15922055100).

Almost surely, 2^232001211221 is an apocalyptic number.

It is an amenable number.

232001211221 is a deficient number, since it is larger than the sum of its proper divisors (22751670379).

232001211221 is a wasteful number, since it uses less digits than its factorization.

232001211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798548.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 232001211221 its reverse (122112100232), we get a palindrome (354113311453).

The spelling of 232001211221 in words is "two hundred thirty-two billion, one million, two hundred eleven thousand, two hundred twenty-one".