21323202222 has 16 divisors (see below), whose sum is σ = 48738748032. Its totient is φ = 6092343480.

The previous prime is 21323202217. The next prime is 21323202239. The reversal of 21323202222 is 22220232312.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 253847604 + ... + 253847687.

It is an arithmetic number, because the mean of its divisors is an integer number (3046171752).

Almost surely, 2^21323202222 is an apocalyptic number.

21323202222 is an abundant number, since it is smaller than the sum of its proper divisors (27415545810).

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

21323202222 is a wasteful number, since it uses less digits than its factorization.

21323202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507695303.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21323202222 its reverse (22220232312), we get a palindrome (43543434534).

The spelling of 21323202222 in words is "twenty-one billion, three hundred twenty-three million, two hundred two thousand, two hundred twenty-two".