22100212 has 6 divisors (see below), whose sum is σ = 38675378. Its totient is φ = 11050104.

The previous prime is 22100207. The next prime is 22100219. The reversal of 22100212 is 21200122.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 6780816 = 3914^2 + 2604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762523 + ... + 2762530.

Almost surely, 2^22100212 is an apocalyptic number.

It is an amenable number.

22100212 is a deficient number, since it is larger than the sum of its proper divisors (16575166).

22100212 is a wasteful number, since it uses less digits than its factorization.

22100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525057 (or 5525055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22100212 is about 4701.0862574516. The cubic root of 22100212 is about 280.6287401680.

Adding to 22100212 its reverse (21200122), we get a palindrome (43300334).

The spelling of 22100212 in words is "twenty-two million, one hundred thousand, two hundred twelve".