22211212 has 12 divisors (see below), whose sum is σ = 39072376. Its totient is φ = 11047680.

The previous prime is 22211201. The next prime is 22211219. The reversal of 22211212 is 21211222.

It is a happy number.

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 = 22211192 and 22211201.

It is not an unprimeable number, because it can be changed into a prime (22211219) 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, 13614 + ... + 15157.

Almost surely, 2^22211212 is an apocalyptic number.

It is an amenable number.

22211212 is a deficient number, since it is larger than the sum of its proper divisors (16861164).

22211212 is a wasteful number, since it uses less digits than its factorization.

22211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28968 (or 28966 counting only the distinct ones).

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

The square root of 22211212 is about 4712.8772528043. The cubic root of 22211212 is about 281.0977821914.

Adding to 22211212 its reverse (21211222), we get a palindrome (43422434).

The spelling of 22211212 in words is "twenty-two million, two hundred eleven thousand, two hundred twelve".