233223222221 has 4 divisors (see below), whose sum is σ = 254425333344. Its totient is φ = 212021111100.

The previous prime is 233223222161. The next prime is 233223222257. The reversal of 233223222221 is 122222322332.

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-233223222221 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 (233223222121) 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, 10601055545 + ... + 10601055566.

It is an arithmetic number, because the mean of its divisors is an integer number (63606333336).

Almost surely, 2^233223222221 is an apocalyptic number.

It is an amenable number.

233223222221 is a deficient number, since it is larger than the sum of its proper divisors (21202111123).

233223222221 is a wasteful number, since it uses less digits than its factorization.

233223222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21202111122.

The product of its digits is 6912, while the sum is 26.

Adding to 233223222221 its reverse (122222322332), we get a palindrome (355445544553).

The spelling of 233223222221 in words is "two hundred thirty-three billion, two hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty-one".