12003312 has 40 divisors (see below), whose sum is σ = 31297104. Its totient is φ = 3963904.

The previous prime is 12003289. The next prime is 12003337. The reversal of 12003312 is 21330021.

It is a happy number.

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

It is a congruent number.

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, 4318 + ... + 6530.

Almost surely, 2^12003312 is an apocalyptic number.

12003312 is a gapful number since it is divisible by the number (12) 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 12003312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15648552).

12003312 is an abundant number, since it is smaller than the sum of its proper divisors (19293792).

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

12003312 is a wasteful number, since it uses less digits than its factorization.

12003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 12003312 is about 3464.5796281800. The cubic root of 12003312 is about 228.9639093153.

Adding to 12003312 its reverse (21330021), we get a palindrome (33333333).

The spelling of 12003312 in words is "twelve million, three thousand, three hundred twelve".