23223222221 has 4 divisors (see below), whose sum is σ = 23603930844. Its totient is φ = 22842513600.

The previous prime is 23223222203. The next prime is 23223222229. The reversal of 23223222221 is 12222232232.

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 685706596 + 22537515625 = 26186^2 + 150125^2 .

It is a cyclic number.

It is not a de Polignac number, because 23223222221 - 2²² = 23219027917 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 (23223222229) 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, 190354220 + ... + 190354341.

It is an arithmetic number, because the mean of its divisors is an integer number (5900982711).

Almost surely, 2^23223222221 is an apocalyptic number.

It is an amenable number.

23223222221 is a deficient number, since it is larger than the sum of its proper divisors (380708623).

23223222221 is an equidigital number, since it uses as much as digits as its factorization.

23223222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380708622.

The product of its digits is 2304, while the sum is 23.

Adding to 23223222221 its reverse (12222232232), we get a palindrome (35445454453).

The spelling of 23223222221 in words is "twenty-three billion, two hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty-one".