12116681 has 4 divisors (see below), whose sum is σ = 12161664. Its totient is φ = 12071700.

The previous prime is 12116677. The next prime is 12116707. The reversal of 12116681 is 18661121.

12116681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12116681 - 2² = 12116677 is a prime.

It is a super-2 number, since 2×12116681² = 293627916911522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12116681.

It is not an unprimeable number, because it can be changed into a prime (12116641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22085 + ... + 22626.

It is an arithmetic number, because the mean of its divisors is an integer number (3040416).

Almost surely, 2^12116681 is an apocalyptic number.

It is an amenable number.

12116681 is a deficient number, since it is larger than the sum of its proper divisors (44983).

12116681 is an equidigital number, since it uses as much as digits as its factorization.

12116681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44982.

The product of its digits is 576, while the sum is 26.

The square root of 12116681 is about 3480.9023255472. The cubic root of 12116681 is about 229.6824919481.

The spelling of 12116681 in words is "twelve million, one hundred sixteen thousand, six hundred eighty-one".