12212212 has 12 divisors (see below), whose sum is σ = 22496320. Its totient is φ = 5784696.

The previous prime is 12212201. The next prime is 12212237. The reversal of 12212212 is 21221221.

It is a happy number.

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

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12212192 and 12212201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80268 + ... + 80419.

Almost surely, 2^12212212 is an apocalyptic number.

It is an amenable number.

12212212 is a deficient number, since it is larger than the sum of its proper divisors (10284108).

12212212 is a wasteful number, since it uses less digits than its factorization.

12212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160710 (or 160708 counting only the distinct ones).

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

The square root of 12212212 is about 3494.5975447825. The cubic root of 12212212 is about 230.2845375768.

Adding to 12212212 its reverse (21221221), we get a palindrome (33433433).

Subtracting 12212212 from its reverse (21221221), we obtain a palindrome (9009009).

It can be divided in two parts, 1221221 and 2, that multiplied together give a palindrome (2442442).

The spelling of 12212212 in words is "twelve million, two hundred twelve thousand, two hundred twelve".