22112212 has 6 divisors (see below), whose sum is σ = 38696378. Its totient is φ = 11056104.

The previous prime is 22112201. The next prime is 22112213. The reversal of 22112212 is 21221122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21399876 + 712336 = 4626^2 + 844^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22112192 and 22112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2764023 + ... + 2764030.

Almost surely, 2^22112212 is an apocalyptic number.

It is an amenable number.

22112212 is a deficient number, since it is larger than the sum of its proper divisors (16584166).

22112212 is a wasteful number, since it uses less digits than its factorization.

22112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528057 (or 5528055 counting only the distinct ones).

The product of its digits is 32, while the sum is 13.

The square root of 22112212 is about 4702.3623850146. The cubic root of 22112212 is about 280.6795230227.

Adding to 22112212 its reverse (21221122), we get a palindrome (43333334).

The spelling of 22112212 in words is "twenty-two million, one hundred twelve thousand, two hundred twelve".