12031020017 has 2 divisors, whose sum is σ = 12031020018. Its totient is φ = 12031020016.

The previous prime is 12031019993. The next prime is 12031020019. The reversal of 12031020017 is 71002013021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8680462561 + 3350557456 = 93169^2 + 57884^2 .

It is an emirp because it is prime and its reverse (71002013021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031020017 - 2²⁰ = 12029971441 is a prime.

Together with 12031020019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031019977 and 12031020004.

It is not a weakly prime, because it can be changed into another prime (12031020019) 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, 6015510008 + 6015510009.

It is an arithmetic number, because the mean of its divisors is an integer number (6015510009).

Almost surely, 2^12031020017 is an apocalyptic number.

It is an amenable number.

12031020017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031020017 is an equidigital number, since it uses as much as digits as its factorization.

12031020017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 12031020017 its reverse (71002013021), we get a palindrome (83033033038).

The spelling of 12031020017 in words is "twelve billion, thirty-one million, twenty thousand, seventeen".