22116212 has 12 divisors (see below), whose sum is σ = 40038180. Its totient is φ = 10676736.

The previous prime is 22116203. The next prime is 22116217. The reversal of 22116212 is 21261122.

It can be written as a sum of positive squares in 2 ways, for example, as 4104676 + 18011536 = 2026^2 + 4244^2 .

It is a super-4 number, since 4×22116212⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22116217) 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, 95213 + ... + 95444.

It is an arithmetic number, because the mean of its divisors is an integer number (3336515).

Almost surely, 2^22116212 is an apocalyptic number.

It is an amenable number.

22116212 is a deficient number, since it is larger than the sum of its proper divisors (17921968).

22116212 is a wasteful number, since it uses less digits than its factorization.

22116212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190690 (or 190688 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 22116212 is about 4702.7876839168. The cubic root of 22116212 is about 280.6964465580.

Adding to 22116212 its reverse (21261122), we get a palindrome (43377334).

The spelling of 22116212 in words is "twenty-two million, one hundred sixteen thousand, two hundred twelve".