23123313021 has 4 divisors (see below), whose sum is σ = 30831084032. Its totient is φ = 15415542012.

The previous prime is 23123313019. The next prime is 23123313029. The reversal of 23123313021 is 12031332132.

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 23123313021 - 2¹ = 23123313019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123313029) 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, 3853885501 + ... + 3853885506.

It is an arithmetic number, because the mean of its divisors is an integer number (7707771008).

Almost surely, 2^23123313021 is an apocalyptic number.

It is an amenable number.

23123313021 is a deficient number, since it is larger than the sum of its proper divisors (7707771011).

23123313021 is an equidigital number, since it uses as much as digits as its factorization.

23123313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707771010.

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

Adding to 23123313021 its reverse (12031332132), we get a palindrome (35154645153).

The spelling of 23123313021 in words is "twenty-three billion, one hundred twenty-three million, three hundred thirteen thousand, twenty-one".