12311200 has 72 divisors (see below), whose sum is σ = 32810400. Its totient is φ = 4473600.

The previous prime is 12311191. The next prime is 12311207. The reversal of 12311200 is 211321.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12311207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8101 + ... + 9499.

It is an arithmetic number, because the mean of its divisors is an integer number (455700).

Almost surely, 2^12311200 is an apocalyptic number.

12311200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16405200).

12311200 is an abundant number, since it is smaller than the sum of its proper divisors (20499200).

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

12311200 is a wasteful number, since it uses less digits than its factorization.

12311200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12311200 is about 3508.7319646847. The cubic root of 12311200 is about 230.9050664673.

Adding to 12311200 its reverse (211321), we get a palindrome (12522521).

The spelling of 12311200 in words is "twelve million, three hundred eleven thousand, two hundred".