232213331221 has 4 divisors (see below), whose sum is σ = 240220687500. Its totient is φ = 224205974944.

The previous prime is 232213331177. The next prime is 232213331227. The reversal of 232213331221 is 122133312232.

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 138022652196 + 94190679025 = 371514^2 + 306905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232213331221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232213331227) 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, 4003678096 + ... + 4003678153.

It is an arithmetic number, because the mean of its divisors is an integer number (60055171875).

Almost surely, 2^232213331221 is an apocalyptic number.

It is an amenable number.

232213331221 is a deficient number, since it is larger than the sum of its proper divisors (8007356279).

232213331221 is an equidigital number, since it uses as much as digits as its factorization.

232213331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007356278.

The product of its digits is 2592, while the sum is 25.

Adding to 232213331221 its reverse (122133312232), we get a palindrome (354346643453).

It can be divided in two parts, 2 and 32213331221, that added together give a palindrome (32213331223).

The spelling of 232213331221 in words is "two hundred thirty-two billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-one".