12031220 has 24 divisors (see below), whose sum is σ = 25394208. Its totient is φ = 4788000.

The previous prime is 12031219. The next prime is 12031247. The reversal of 12031220 is 2213021.

It is a happy number.

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, 2795 + ... + 5645.

It is an arithmetic number, because the mean of its divisors is an integer number (1058092).

Almost surely, 2^12031220 is an apocalyptic number.

12031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031220 is an abundant number, since it is smaller than the sum of its proper divisors (13362988).

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

12031220 is a wasteful number, since it uses less digits than its factorization.

12031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12031220 is about 3468.6049068754. The cubic root of 12031220 is about 229.1412209029.

Adding to 12031220 its reverse (2213021), we get a palindrome (14244241).

The spelling of 12031220 in words is "twelve million, thirty-one thousand, two hundred twenty".