23133020221 has 4 divisors (see below), whose sum is σ = 23411731392. Its totient is φ = 22854309052.

The previous prime is 23133020213. The next prime is 23133020263. The reversal of 23133020221 is 12202033132.

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 23133020221 - 2³ = 23133020213 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 (23133020321) 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, 139355461 + ... + 139355626.

It is an arithmetic number, because the mean of its divisors is an integer number (5852932848).

Almost surely, 2^23133020221 is an apocalyptic number.

It is an amenable number.

23133020221 is a deficient number, since it is larger than the sum of its proper divisors (278711171).

23133020221 is an equidigital number, since it uses as much as digits as its factorization.

23133020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278711170.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23133020221 its reverse (12202033132), we get a palindrome (35335053353).

The spelling of 23133020221 in words is "twenty-three billion, one hundred thirty-three million, twenty thousand, two hundred twenty-one".