21222312230023 has 4 divisors (see below), whose sum is σ = 21222321480360. Its totient is φ = 21222302979688.

The previous prime is 21222312229957. The next prime is 21222312230027. The reversal of 21222312230023 is 32003221322212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21222312230023 - 2²¹ = 21222310132871 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 21222312230023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222312230027) 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, 1694361 + ... + 6731677.

It is an arithmetic number, because the mean of its divisors is an integer number (5305580370090).

Almost surely, 2^{21222312230023} is an apocalyptic number.

21222312230023 is a deficient number, since it is larger than the sum of its proper divisors (9250337).

21222312230023 is an equidigital number, since it uses as much as digits as its factorization.

21222312230023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250336.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21222312230023 its reverse (32003221322212), we get a palindrome (53225533552235).

The spelling of 21222312230023 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twelve million, two hundred thirty thousand, twenty-three".