21023310222 has 12 divisors (see below), whose sum is σ = 45550505520. Its totient is φ = 7007770068.

The previous prime is 21023310197. The next prime is 21023310227. The reversal of 21023310222 is 22201332012.

21023310222 is a `hidden beast` number, since 210 + 233 + 1 + 0 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1167961679 = 21023310222 / (2 + 1 + 0 + 2 + 3 + 3 + 1 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21023310195 and 21023310204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023310227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583980822 + ... + 583980857.

It is an arithmetic number, because the mean of its divisors is an integer number (3795875460).

Almost surely, 2^21023310222 is an apocalyptic number.

21023310222 is an abundant number, since it is smaller than the sum of its proper divisors (24527195298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023310222 is a wasteful number, since it uses less digits than its factorization.

21023310222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167961687 (or 1167961684 counting only the distinct ones).

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

Adding to 21023310222 its reverse (22201332012), we get a palindrome (43224642234).

The spelling of 21023310222 in words is "twenty-one billion, twenty-three million, three hundred ten thousand, two hundred twenty-two".