23331033221 has 4 divisors (see below), whose sum is σ = 23514742272. Its totient is φ = 23147324172.

The previous prime is 23331033217. The next prime is 23331033233. The reversal of 23331033221 is 12233013332.

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 not a de Polignac number, because 23331033221 - 2² = 23331033217 is a prime.

It is a super-2 number, since 2×23331033221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23331033421) 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, 91854335 + ... + 91854588.

It is an arithmetic number, because the mean of its divisors is an integer number (5878685568).

Almost surely, 2^23331033221 is an apocalyptic number.

It is an amenable number.

23331033221 is a deficient number, since it is larger than the sum of its proper divisors (183709051).

23331033221 is a wasteful number, since it uses less digits than its factorization.

23331033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183709050.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 23331033221 its reverse (12233013332), we get a palindrome (35564046553).

The spelling of 23331033221 in words is "twenty-three billion, three hundred thirty-one million, thirty-three thousand, two hundred twenty-one".