21223131323 has 8 divisors (see below), whose sum is σ = 21373987248. Its totient is φ = 21072697344.

The previous prime is 21223131301. The next prime is 21223131337. The reversal of 21223131323 is 32313132212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223131323 - 2²⁰ = 21222082747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223131383) 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, 4190 + ... + 206067.

It is an arithmetic number, because the mean of its divisors is an integer number (2671748406).

Almost surely, 2^21223131323 is an apocalyptic number.

21223131323 is a deficient number, since it is larger than the sum of its proper divisors (150855925).

21223131323 is a wasteful number, since it uses less digits than its factorization.

21223131323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210973.

The product of its digits is 1296, while the sum is 23.

Adding to 21223131323 its reverse (32313132212), we get a palindrome (53536263535).

The spelling of 21223131323 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-three".