12231320 has 16 divisors (see below), whose sum is σ = 27520560. Its totient is φ = 4892512.

The previous prime is 12231311. The next prime is 12231367. The reversal of 12231320 is 2313221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12231295 and 12231304.

It is a congruent number.

It is an unprimeable number.

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, 152852 + ... + 152931.

It is an arithmetic number, because the mean of its divisors is an integer number (1720035).

Almost surely, 2^12231320 is an apocalyptic number.

12231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12231320 is an abundant number, since it is smaller than the sum of its proper divisors (15289240).

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

12231320 is a wasteful number, since it uses less digits than its factorization.

12231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305794 (or 305790 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12231320 is about 3497.3304104702. The cubic root of 12231320 is about 230.4045809114.

Adding to 12231320 its reverse (2313221), we get a palindrome (14544541).

The spelling of 12231320 in words is "twelve million, two hundred thirty-one thousand, three hundred twenty".