12111240 has 32 divisors (see below), whose sum is σ = 36334080. Its totient is φ = 3229632.

The previous prime is 12111221. The next prime is 12111263. The reversal of 12111240 is 4211121.

It is a happy number.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50344 + ... + 50583.

It is an arithmetic number, because the mean of its divisors is an integer number (1135440).

Almost surely, 2^12111240 is an apocalyptic number.

12111240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111240 is an abundant number, since it is smaller than the sum of its proper divisors (24222840).

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

12111240 is a wasteful number, since it uses less digits than its factorization.

12111240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100941 (or 100937 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 12111240 is about 3480.1206875624. The cubic root of 12111240 is about 229.6481071320.

Adding to 12111240 its reverse (4211121), we get a palindrome (16322361).

The spelling of 12111240 in words is "twelve million, one hundred eleven thousand, two hundred forty".