12111144 has 16 divisors (see below), whose sum is σ = 30277920. Its totient is φ = 4037040.

The previous prime is 12111139. The next prime is 12111149. The reversal of 12111144 is 44111121.

It is an interprime number because it is at equal distance from previous prime (12111139) and next prime (12111149).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12111149) by changing a digit.

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, 252292 + ... + 252339.

It is an arithmetic number, because the mean of its divisors is an integer number (1892370).

Almost surely, 2^12111144 is an apocalyptic number.

It is an amenable number.

12111144 is an abundant number, since it is smaller than the sum of its proper divisors (18166776).

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

12111144 is a wasteful number, since it uses less digits than its factorization.

12111144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504640 (or 504636 counting only the distinct ones).

The product of its digits is 32, while the sum is 15.

The square root of 12111144 is about 3480.1068949100. The cubic root of 12111144 is about 229.6475003602.

Adding to 12111144 its reverse (44111121), we get a palindrome (56222265).

It can be divided in two parts, 12 and 111144, that added together give a triangular number (111156 = T₄₇₁).

The spelling of 12111144 in words is "twelve million, one hundred eleven thousand, one hundred forty-four".