21231022000222 has 16 divisors (see below), whose sum is σ = 33572182850640. Its totient is φ = 10041944934528.

The previous prime is 21231022000213. The next prime is 21231022000277. The reversal of 21231022000222 is 22200022013212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21231022000222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412611723 + ... + 412663174.

It is an arithmetic number, because the mean of its divisors is an integer number (2098261428165).

Almost surely, 2^{21231022000222} is an apocalyptic number.

21231022000222 is a deficient number, since it is larger than the sum of its proper divisors (12341160850418).

21231022000222 is a wasteful number, since it uses less digits than its factorization.

21231022000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825275595.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21231022000222 its reverse (22200022013212), we get a palindrome (43431044013434).

The spelling of 21231022000222 in words is "twenty-one trillion, two hundred thirty-one billion, twenty-two million, two hundred twenty-two", and thus it is an aban number.