12031000109 has 2 divisors, whose sum is σ = 12031000110. Its totient is φ = 12031000108.

The previous prime is 12031000099. The next prime is 12031000123. The reversal of 12031000109 is 90100013021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10737518884 + 1293481225 = 103622^2 + 35965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031000109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031000129) 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, 6015500054 + 6015500055.

It is an arithmetic number, because the mean of its divisors is an integer number (6015500055).

Almost surely, 2^12031000109 is an apocalyptic number.

It is an amenable number.

12031000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031000109 is an equidigital number, since it uses as much as digits as its factorization.

12031000109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 12031000109 in words is "twelve billion, thirty-one million, one hundred nine", and thus it is an aban number.