12210312 has 32 divisors (see below), whose sum is σ = 32133600. Its totient is φ = 3855744.

The previous prime is 12210307. The next prime is 12210343. The reversal of 12210312 is 21301221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12933 + ... + 13844.

It is an arithmetic number, because the mean of its divisors is an integer number (1004175).

Almost surely, 2^12210312 is an apocalyptic number.

12210312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12210312 is an abundant number, since it is smaller than the sum of its proper divisors (19923288).

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

12210312 is a wasteful number, since it uses less digits than its factorization.

12210312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26805 (or 26801 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12210312 is about 3494.3256860230. The cubic root of 12210312 is about 230.2725942500.

Adding to 12210312 its reverse (21301221), we get a palindrome (33511533).

Subtracting 12210312 from its reverse (21301221), we obtain a palindrome (9090909).

The spelling of 12210312 in words is "twelve million, two hundred ten thousand, three hundred twelve".