21323213233223 has 16 divisors (see below), whose sum is σ = 23293730113056. Its totient is φ = 19358041059840.

The previous prime is 21323213233199. The next prime is 21323213233247. The reversal of 21323213233223 is 32233231232312.

It is an interprime number because it is at equal distance from previous prime (21323213233199) and next prime (21323213233247).

It is a cyclic number.

It is not a de Polignac number, because 21323213233223 - 2²⁴ = 21323196456007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21323213233223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323213236223) 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, 108000011 + ... + 108197267.

It is an arithmetic number, because the mean of its divisors is an integer number (1455858132066).

Almost surely, 2^{21323213233223} is an apocalyptic number.

21323213233223 is a deficient number, since it is larger than the sum of its proper divisors (1970516879833).

21323213233223 is a wasteful number, since it uses less digits than its factorization.

21323213233223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210754.

The product of its digits is 46656, while the sum is 32.

Adding to 21323213233223 its reverse (32233231232312), we get a palindrome (53556444465535).

The spelling of 21323213233223 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred thirteen million, two hundred thirty-three thousand, two hundred twenty-three".