21220222022 has 8 divisors (see below), whose sum is σ = 31834207200. Its totient is φ = 10608819624.

The previous prime is 21220221983. The next prime is 21220222033. The reversal of 21220222022 is 22022202212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625022 + ... + 658097.

It is an arithmetic number, because the mean of its divisors is an integer number (3979275900).

Almost surely, 2^21220222022 is an apocalyptic number.

21220222022 is a deficient number, since it is larger than the sum of its proper divisors (10613985178).

21220222022 is a wasteful number, since it uses less digits than its factorization.

21220222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291390.

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

Adding to 21220222022 its reverse (22022202212), we get a palindrome (43242424234).

The spelling of 21220222022 in words is "twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, twenty-two".