12031130 has 16 divisors (see below), whose sum is σ = 21954024. Its totient is φ = 4746240.

The previous prime is 12031111. The next prime is 12031133. The reversal of 12031130 is 3113021.

12031130 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 4 ways, for example, as 9467929 + 2563201 = 3077^2 + 1601^2 .

It is not an unprimeable number, because it can be changed into a prime (12031133) 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 7 ways as a sum of consecutive naturals, for example, 7511 + ... + 8970.

Almost surely, 2^12031130 is an apocalyptic number.

12031130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12031130 is a deficient number, since it is larger than the sum of its proper divisors (9922894).

12031130 is a wasteful number, since it uses less digits than its factorization.

12031130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 12031130 is about 3468.5919333355. The cubic root of 12031130 is about 229.1406495349.

Adding to 12031130 its reverse (3113021), we get a palindrome (15144151).

The spelling of 12031130 in words is "twelve million, thirty-one thousand, one hundred thirty".