22221420212 has 12 divisors (see below), whose sum is σ = 38953067076. Its totient is φ = 11091972480.

The previous prime is 22221420211. The next prime is 22221420253. The reversal of 22221420212 is 21202412222.

It can be written as a sum of positive squares in 2 ways, for example, as 6724656016 + 15496764196 = 82004^2 + 124486^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221420211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4681739 + ... + 4686482.

It is an arithmetic number, because the mean of its divisors is an integer number (3246088923).

Almost surely, 2^22221420212 is an apocalyptic number.

It is an amenable number.

22221420212 is a deficient number, since it is larger than the sum of its proper divisors (16731646864).

22221420212 is a wasteful number, since it uses less digits than its factorization.

22221420212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368818 (or 9368816 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22221420212 its reverse (21202412222), we get a palindrome (43423832434).

The spelling of 22221420212 in words is "twenty-two billion, two hundred twenty-one million, four hundred twenty thousand, two hundred twelve".