12111056 has 20 divisors (see below), whose sum is σ = 24700800. Its totient is φ = 5736672.

The previous prime is 12111053. The next prime is 12111059. The reversal of 12111056 is 65011121.

It is an interprime number because it is at equal distance from previous prime (12111053) and next prime (12111059).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111053) 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, 19616 + ... + 20223.

It is an arithmetic number, because the mean of its divisors is an integer number (1235040).

Almost surely, 2^12111056 is an apocalyptic number.

12111056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12111056 is an abundant number, since it is smaller than the sum of its proper divisors (12589744).

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

12111056 is a wasteful number, since it uses less digits than its factorization.

12111056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39866 (or 39860 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 12111056 is about 3480.0942515972. The cubic root of 12111056 is about 229.6469441499.

Adding to 12111056 its reverse (65011121), we get a palindrome (77122177).

The spelling of 12111056 in words is "twelve million, one hundred eleven thousand, fifty-six".