12107854021 has 2 divisors, whose sum is σ = 12107854022. Its totient is φ = 12107854020.

The previous prime is 12107854007. The next prime is 12107854027. The reversal of 12107854021 is 12045870121.

12107854021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11148403396 + 959450625 = 105586^2 + 30975^2 .

It is an emirp because it is prime and its reverse (12045870121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12107854021 - 2⁷ = 12107853893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12107854027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6053927010 + 6053927011.

It is an arithmetic number, because the mean of its divisors is an integer number (6053927011).

Almost surely, 2^12107854021 is an apocalyptic number.

It is an amenable number.

12107854021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12107854021 is an equidigital number, since it uses as much as digits as its factorization.

12107854021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The spelling of 12107854021 in words is "twelve billion, one hundred seven million, eight hundred fifty-four thousand, twenty-one".