21223213123023 has 12 divisors (see below), whose sum is σ = 30691691048200. Its totient is φ = 14132221628976.

The previous prime is 21223213122997. The next prime is 21223213123067. The reversal of 21223213123023 is 32032131232212.

21223213123023 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 321 + 31 + 2 + 302 + 3 = 666.

It is not a de Polignac number, because 21223213123023 - 2⁶ = 21223213122959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223213121023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1382251873 + ... + 1382267226.

Almost surely, 2^{21223213123023} is an apocalyptic number.

21223213123023 is a deficient number, since it is larger than the sum of its proper divisors (9468477925177).

21223213123023 is a wasteful number, since it uses less digits than its factorization.

21223213123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764519958 (or 2764519955 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21223213123023 its reverse (32032131232212), we get a palindrome (53255344355235).

The spelling of 21223213123023 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirteen million, one hundred twenty-three thousand, twenty-three".