21231113323 has 24 divisors (see below), whose sum is σ = 27526554000. Its totient is φ = 16226155008.

The previous prime is 21231113317. The next prime is 21231113339. The reversal of 21231113323 is 32331113212.

It is not a de Polignac number, because 21231113323 - 2⁹ = 21231112811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21231113294 and 21231113303.

It is not an unprimeable number, because it can be changed into a prime (21231113383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 654898 + ... + 686551.

It is an arithmetic number, because the mean of its divisors is an integer number (1146939750).

Almost surely, 2^21231113323 is an apocalyptic number.

21231113323 is a deficient number, since it is larger than the sum of its proper divisors (6295440677).

21231113323 is a wasteful number, since it uses less digits than its factorization.

21231113323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341499 (or 1341492 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21231113323 its reverse (32331113212), we get a palindrome (53562226535).

The spelling of 21231113323 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred twenty-three".