12222312 has 16 divisors (see below), whose sum is σ = 30555840. Its totient is φ = 4074096.

The previous prime is 12222307. The next prime is 12222319. The reversal of 12222312 is 21322221.

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 = 12222291 and 12222300.

It is not an unprimeable number, because it can be changed into a prime (12222319) 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, 254608 + ... + 254655.

It is an arithmetic number, because the mean of its divisors is an integer number (1909740).

Almost surely, 2^12222312 is an apocalyptic number.

12222312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222312 is an abundant number, since it is smaller than the sum of its proper divisors (18333528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12222312 is a wasteful number, since it uses less digits than its factorization.

12222312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509272 (or 509268 counting only the distinct ones).

The product of its digits is 96, while the sum is 15.

The square root of 12222312 is about 3496.0423338398. The cubic root of 12222312 is about 230.3480050012.

Adding to 12222312 its reverse (21322221), we get a palindrome (33544533).

Subtracting 12222312 from its reverse (21322221), we obtain a palindrome (9099909).

The spelling of 12222312 in words is "twelve million, two hundred twenty-two thousand, three hundred twelve".