12109849867 has 2 divisors, whose sum is σ = 12109849868. Its totient is φ = 12109849866.

The previous prime is 12109849847. The next prime is 12109849897. The reversal of 12109849867 is 76894890121.

It is a happy number.

12109849867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12109849867 - 2¹¹ = 12109847819 is a prime.

It is not a weakly prime, because it can be changed into another prime (12109849847) 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, 6054924933 + 6054924934.

It is an arithmetic number, because the mean of its divisors is an integer number (6054924934).

Almost surely, 2^12109849867 is an apocalyptic number.

12109849867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12109849867 is an equidigital number, since it uses as much as digits as its factorization.

12109849867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 12109849867 in words is "twelve billion, one hundred nine million, eight hundred forty-nine thousand, eight hundred sixty-seven".