21222202022 has 16 divisors (see below), whose sum is σ = 37554496512. Its totient is φ = 8801834760.

The previous prime is 21222202021. The next prime is 21222202049. The reversal of 21222202022 is 22020222212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24449108 + ... + 24449975.

It is an arithmetic number, because the mean of its divisors is an integer number (2347156032).

Almost surely, 2^21222202022 is an apocalyptic number.

21222202022 is a deficient number, since it is larger than the sum of its proper divisors (16332294490).

21222202022 is a wasteful number, since it uses less digits than its factorization.

21222202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48899123.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21222202022 its reverse (22020222212), we get a palindrome (43242424234).

The spelling of 21222202022 in words is "twenty-one billion, two hundred twenty-two million, two hundred two thousand, twenty-two".