21223100223 has 48 divisors (see below), whose sum is σ = 34269764256. Its totient is φ = 13047661440.

The previous prime is 21223100183. The next prime is 21223100243. The reversal of 21223100223 is 32200132212.

21223100223 is a `hidden beast` number, since 212 + 231 + 0 + 0 + 223 = 666.

It is not a de Polignac number, because 21223100223 - 2⁸ = 21223099967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21223100196 and 21223100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223100243) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4031413 + ... + 4036673.

It is an arithmetic number, because the mean of its divisors is an integer number (713953422).

Almost surely, 2^21223100223 is an apocalyptic number.

21223100223 is a deficient number, since it is larger than the sum of its proper divisors (13046664033).

21223100223 is a wasteful number, since it uses less digits than its factorization.

21223100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566 (or 6554 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21223100223 its reverse (32200132212), we get a palindrome (53423232435).

The spelling of 21223100223 in words is "twenty-one billion, two hundred twenty-three million, one hundred thousand, two hundred twenty-three".