23121323331 has 12 divisors (see below), whose sum is σ = 32748542232. Its totient is φ = 14507496448.

The previous prime is 23121323279. The next prime is 23121323339. The reversal of 23121323331 is 13332312132.

It is a de Polignac number, because none of the positive numbers 2^k-23121323331 is a prime.

It is a super-2 number, since 2×23121323331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23121323339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13333230 + ... + 13334963.

It is an arithmetic number, because the mean of its divisors is an integer number (2729045186).

Almost surely, 2^23121323331 is an apocalyptic number.

23121323331 is a deficient number, since it is larger than the sum of its proper divisors (9627218901).

23121323331 is a wasteful number, since it uses less digits than its factorization.

23121323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668230 (or 26668213 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 23121323331 its reverse (13332312132), we get a palindrome (36453635463).

The spelling of 23121323331 in words is "twenty-three billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred thirty-one".