12120211011017 has 2 divisors, whose sum is σ = 12120211011018. Its totient is φ = 12120211011016.

The previous prime is 12120211011001. The next prime is 12120211011031. The reversal of 12120211011017 is 71011011202121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11830875676816 + 289335334201 = 3439604^2 + 537899^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120211011017 - 2⁴ = 12120211011001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12120211011017.

It is not a weakly prime, because it can be changed into another prime (12120211031017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060105505508 + 6060105505509.

It is an arithmetic number, because the mean of its divisors is an integer number (6060105505509).

Almost surely, 2^{12120211011017} is an apocalyptic number.

It is an amenable number.

12120211011017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120211011017 is an equidigital number, since it uses as much as digits as its factorization.

12120211011017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 12120211011017 its reverse (71011011202121), we get a palindrome (83131222213138).

The spelling of 12120211011017 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, eleven thousand, seventeen".