21223031232323 has 4 divisors (see below), whose sum is σ = 21245584932768. Its totient is φ = 21200477531880.

The previous prime is 21223031232197. The next prime is 21223031232331. The reversal of 21223031232323 is 32323213032212.

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 21223031232323 - 2¹⁸ = 21223030970179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223031232353) 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, 11276848811 + ... + 11276850692.

It is an arithmetic number, because the mean of its divisors is an integer number (5311396233192).

Almost surely, 2^{21223031232323} is an apocalyptic number.

21223031232323 is a deficient number, since it is larger than the sum of its proper divisors (22553700445).

21223031232323 is an equidigital number, since it uses as much as digits as its factorization.

21223031232323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22553700444.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21223031232323 its reverse (32323213032212), we get a palindrome (53546244264535).

The spelling of 21223031232323 in words is "twenty-one trillion, two hundred twenty-three billion, thirty-one million, two hundred thirty-two thousand, three hundred twenty-three".