12312212 has 12 divisors (see below), whose sum is σ = 23505216. Its totient is φ = 5596440.

The previous prime is 12312197. The next prime is 12312217. The reversal of 12312212 is 21221321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312217) 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, 139868 + ... + 139955.

It is an arithmetic number, because the mean of its divisors is an integer number (1958768).

Almost surely, 2^12312212 is an apocalyptic number.

It is an amenable number.

12312212 is a deficient number, since it is larger than the sum of its proper divisors (11193004).

12312212 is a wasteful number, since it uses less digits than its factorization.

12312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279838 (or 279836 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 12312212 is about 3508.8761733638. The cubic root of 12312212 is about 230.9113932138.

Adding to 12312212 its reverse (21221321), we get a palindrome (33533533).

It can be divided in two parts, 1231 and 2212, that added together give a palindrome (3443).

The spelling of 12312212 in words is "twelve million, three hundred twelve thousand, two hundred twelve".