23121324423 has 8 divisors (see below), whose sum is σ = 34253814000. Its totient is φ = 15414216264.

The previous prime is 23121324389. The next prime is 23121324433. The reversal of 23121324423 is 32442312132.

23121324423 is a `hidden beast` number, since 2 + 3 + 1 + 213 + 2 + 442 + 3 = 666.

It is not a de Polignac number, because 23121324423 - 2¹⁴ = 23121308039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 856345349 = 23121324423 / (2 + 3 + 1 + 2 + 1 + 3 + 2 + 4 + 4 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121324433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428172648 + ... + 428172701.

It is an arithmetic number, because the mean of its divisors is an integer number (4281726750).

Almost surely, 2^23121324423 is an apocalyptic number.

23121324423 is a deficient number, since it is larger than the sum of its proper divisors (11132489577).

23121324423 is an equidigital number, since it uses as much as digits as its factorization.

23121324423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856345358 (or 856345352 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 23121324423 its reverse (32442312132), we get a palindrome (55563636555).

The spelling of 23121324423 in words is "twenty-three billion, one hundred twenty-one million, three hundred twenty-four thousand, four hundred twenty-three".