22112321212 has 12 divisors (see below), whose sum is σ = 38697834280. Its totient is φ = 11055797136.

The previous prime is 22112321197. The next prime is 22112321213. The reversal of 22112321212 is 21212321122.

It is a self number, because there is not a number n which added to its sum of digits gives 22112321212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112321213) 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 3 ways as a sum of consecutive naturals, for example, 82963 + ... + 226069.

Almost surely, 2^22112321212 is an apocalyptic number.

It is an amenable number.

22112321212 is a deficient number, since it is larger than the sum of its proper divisors (16585513068).

22112321212 is a wasteful number, since it uses less digits than its factorization.

22112321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181740 (or 181738 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

Adding to 22112321212 its reverse (21212321122), we get a palindrome (43324642334).

The spelling of 22112321212 in words is "twenty-two billion, one hundred twelve million, three hundred twenty-one thousand, two hundred twelve".