12159187109 has 2 divisors, whose sum is σ = 12159187110. Its totient is φ = 12159187108.

The previous prime is 12159187093. The next prime is 12159187129. The reversal of 12159187109 is 90178195121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7853858884 + 4305328225 = 88622^2 + 65615^2 .

It is a cyclic number.

It is not a de Polignac number, because 12159187109 - 2⁴ = 12159187093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12159187109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12159187129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079593554 + 6079593555.

It is an arithmetic number, because the mean of its divisors is an integer number (6079593555).

Almost surely, 2^12159187109 is an apocalyptic number.

It is an amenable number.

12159187109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12159187109 is an equidigital number, since it uses as much as digits as its factorization.

12159187109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 44.

The spelling of 12159187109 in words is "twelve billion, one hundred fifty-nine million, one hundred eighty-seven thousand, one hundred nine".