23133013221 has 4 divisors (see below), whose sum is σ = 30844017632. Its totient is φ = 15422008812.

The previous prime is 23133013159. The next prime is 23133013229. The reversal of 23133013221 is 12231033132.

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 not a de Polignac number, because 23133013221 - 2⁶ = 23133013157 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 (23133013229) 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, 3855502201 + ... + 3855502206.

It is an arithmetic number, because the mean of its divisors is an integer number (7711004408).

Almost surely, 2^23133013221 is an apocalyptic number.

It is an amenable number.

23133013221 is a deficient number, since it is larger than the sum of its proper divisors (7711004411).

23133013221 is an equidigital number, since it uses as much as digits as its factorization.

23133013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7711004410.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23133013221 its reverse (12231033132), we get a palindrome (35364046353).

The spelling of 23133013221 in words is "twenty-three billion, one hundred thirty-three million, thirteen thousand, two hundred twenty-one".