21222002222022 has 64 divisors (see below), whose sum is σ = 49006689177600. Its totient is φ = 6001266529440.

The previous prime is 21222002222021. The next prime is 21222002222077. The reversal of 21222002222022 is 22022220022212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21222002222022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222002222021) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3003322 + ... + 7173837.

It is an arithmetic number, because the mean of its divisors is an integer number (765729518400).

Almost surely, 2^{21222002222022} is an apocalyptic number.

21222002222022 is an abundant number, since it is smaller than the sum of its proper divisors (27784686955578).

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

21222002222022 is a wasteful number, since it uses less digits than its factorization.

21222002222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177681.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 21222002222022 its reverse (22022220022212), we get a palindrome (43244222244234).

The spelling of 21222002222022 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred twenty-two thousand, twenty-two".