12212312 has 16 divisors (see below), whose sum is σ = 26169360. Its totient is φ = 5233824.

The previous prime is 12212311. The next prime is 12212327. The reversal of 12212312 is 21321221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108983 + ... + 109094.

It is an arithmetic number, because the mean of its divisors is an integer number (1635585).

Almost surely, 2^12212312 is an apocalyptic number.

It is an amenable number.

12212312 is an abundant number, since it is smaller than the sum of its proper divisors (13957048).

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

12212312 is a wasteful number, since it uses less digits than its factorization.

12212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218090 (or 218086 counting only the distinct ones).

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

The square root of 12212312 is about 3494.6118525524. The cubic root of 12212312 is about 230.2851661386.

Adding to 12212312 its reverse (21321221), we get a palindrome (33533533).

The spelling of 12212312 in words is "twelve million, two hundred twelve thousand, three hundred twelve".