23123033221 has 4 divisors (see below), whose sum is σ = 23123479744. Its totient is φ = 23122586700.

The previous prime is 23123033147. The next prime is 23123033239. The reversal of 23123033221 is 12233032132.

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 23123033221 - 2¹⁷ = 23122902149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23123033192 and 23123033201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123033251) 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, 133575 + ... + 253156.

It is an arithmetic number, because the mean of its divisors is an integer number (5780869936).

Almost surely, 2^23123033221 is an apocalyptic number.

It is an amenable number.

23123033221 is a deficient number, since it is larger than the sum of its proper divisors (446523).

23123033221 is an equidigital number, since it uses as much as digits as its factorization.

23123033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446522.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23123033221 its reverse (12233032132), we get a palindrome (35356065353).

The spelling of 23123033221 in words is "twenty-three billion, one hundred twenty-three million, thirty-three thousand, two hundred twenty-one".