23121212323 has 16 divisors (see below), whose sum is σ = 26509190400. Its totient is φ = 19960728480.

The previous prime is 23121212281. The next prime is 23121212333. The reversal of 23121212323 is 32321212132.

It is a de Polignac number, because none of the positive numbers 2^k-23121212323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23121212294 and 23121212303.

It is not an unprimeable number, because it can be changed into a prime (23121212333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293568 + ... + 363901.

It is an arithmetic number, because the mean of its divisors is an integer number (1656824400).

Almost surely, 2^23121212323 is an apocalyptic number.

23121212323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23121212323 is a deficient number, since it is larger than the sum of its proper divisors (3387978077).

23121212323 is a wasteful number, since it uses less digits than its factorization.

23121212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657642.

The product of its digits is 864, while the sum is 22.

Adding to 23121212323 its reverse (32321212132), we get a palindrome (55442424455).

The spelling of 23121212323 in words is "twenty-three billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-three".