12107021 has 4 divisors (see below), whose sum is σ = 12127200. Its totient is φ = 12086844.

The previous prime is 12107003. The next prime is 12107041. The reversal of 12107021 is 12070121.

12107021 is digitally balanced in base 3, 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 12107021 - 2²² = 7912717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12106987 and 12107005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12107041) 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 3 ways as a sum of consecutive naturals, for example, 9161 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (3031800).

Almost surely, 2^12107021 is an apocalyptic number.

It is an amenable number.

12107021 is a deficient number, since it is larger than the sum of its proper divisors (20179).

12107021 is an equidigital number, since it uses as much as digits as its factorization.

12107021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20178.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 12107021 is about 3479.5144776247. The cubic root of 12107021 is about 229.6214377491.

Adding to 12107021 its reverse (12070121), we get a palindrome (24177142).

The spelling of 12107021 in words is "twelve million, one hundred seven thousand, twenty-one".