12031019993 has 2 divisors, whose sum is σ = 12031019994. Its totient is φ = 12031019992.

The previous prime is 12031019983. The next prime is 12031020017. The reversal of 12031019993 is 39991013021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10129013449 + 1902006544 = 100643^2 + 43612^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031019993 - 2²⁶ = 11963911129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12031019983) 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, 6015509996 + 6015509997.

It is an arithmetic number, because the mean of its divisors is an integer number (6015509997).

Almost surely, 2^12031019993 is an apocalyptic number.

It is an amenable number.

12031019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031019993 is an equidigital number, since it uses as much as digits as its factorization.

12031019993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 12031019993 in words is "twelve billion, thirty-one million, nineteen thousand, nine hundred ninety-three".