232331232221 has 4 divisors (see below), whose sum is σ = 253452253344. Its totient is φ = 211210211100.

The previous prime is 232331232197. The next prime is 232331232227. The reversal of 232331232221 is 122232133232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232331232221 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 (232331232227) 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 3 ways as a sum of consecutive naturals, for example, 10560510545 + ... + 10560510566.

It is an arithmetic number, because the mean of its divisors is an integer number (63363063336).

Almost surely, 2^232331232221 is an apocalyptic number.

It is an amenable number.

232331232221 is a deficient number, since it is larger than the sum of its proper divisors (21121021123).

232331232221 is a wasteful number, since it uses less digits than its factorization.

232331232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121021122.

The product of its digits is 5184, while the sum is 26.

Adding to 232331232221 its reverse (122232133232), we get a palindrome (354563365453).

The spelling of 232331232221 in words is "two hundred thirty-two billion, three hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-one".