22221203212 has 48 divisors (see below), whose sum is σ = 42599118240. Its totient is φ = 10080419328.

The previous prime is 22221203167. The next prime is 22221203227. The reversal of 22221203212 is 21230212222.

It is a self number, because there is not a number n which added to its sum of digits gives 22221203212.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1102239 + ... + 1122217.

It is an arithmetic number, because the mean of its divisors is an integer number (887481630).

Almost surely, 2^22221203212 is an apocalyptic number.

It is an amenable number.

22221203212 is a deficient number, since it is larger than the sum of its proper divisors (20377915028).

22221203212 is a wasteful number, since it uses less digits than its factorization.

22221203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20362 (or 20360 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22221203212 its reverse (21230212222), we get a palindrome (43451415434).

The spelling of 22221203212 in words is "twenty-two billion, two hundred twenty-one million, two hundred three thousand, two hundred twelve".