22122011212 has 24 divisors (see below), whose sum is σ = 44442438656. Its totient is φ = 9438344208.

The previous prime is 22122011189. The next prime is 22122011213. The reversal of 22122011212 is 21211022122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22122011213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765218 + ... + 1777705.

Almost surely, 2^22122011212 is an apocalyptic number.

It is an amenable number.

22122011212 is an abundant number, since it is smaller than the sum of its proper divisors (22320427444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22122011212 is a wasteful number, since it uses less digits than its factorization.

22122011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543157 (or 3543155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22122011212 its reverse (21211022122), we get a palindrome (43333033334).

The spelling of 22122011212 in words is "twenty-two billion, one hundred twenty-two million, eleven thousand, two hundred twelve".