22102221212 has 12 divisors (see below), whose sum is σ = 38784281760. Its totient is φ = 11020997856.

The previous prime is 22102221191. The next prime is 22102221217. The reversal of 22102221212 is 21212220122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102221217) 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, 7526537 + ... + 7529472.

It is an arithmetic number, because the mean of its divisors is an integer number (3232023480).

Almost surely, 2^22102221212 is an apocalyptic number.

It is an amenable number.

22102221212 is a deficient number, since it is larger than the sum of its proper divisors (16682060548).

22102221212 is a wasteful number, since it uses less digits than its factorization.

22102221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15056380 (or 15056378 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22102221212 its reverse (21212220122), we get a palindrome (43314441334).

The spelling of 22102221212 in words is "twenty-two billion, one hundred two million, two hundred twenty-one thousand, two hundred twelve".