23121201323 has 4 divisors (see below), whose sum is σ = 25223128728. Its totient is φ = 21019273920.

The previous prime is 23121201223. The next prime is 23121201347. The reversal of 23121201323 is 32310212132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121201323 - 2¹⁰ = 23121200299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121201295 and 23121201304.

It is not an unprimeable number, because it can be changed into a prime (23121201223) 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, 1050963686 + ... + 1050963707.

It is an arithmetic number, because the mean of its divisors is an integer number (6305782182).

Almost surely, 2^23121201323 is an apocalyptic number.

23121201323 is a deficient number, since it is larger than the sum of its proper divisors (2101927405).

23121201323 is a wasteful number, since it uses less digits than its factorization.

23121201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101927404.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23121201323 its reverse (32310212132), we get a palindrome (55431413455).

The spelling of 23121201323 in words is "twenty-three billion, one hundred twenty-one million, two hundred one thousand, three hundred twenty-three".