12021120111017 has 2 divisors, whose sum is σ = 12021120111018. Its totient is φ = 12021120111016.

The previous prime is 12021120110971. The next prime is 12021120111019. The reversal of 12021120111017 is 71011102112021.

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., 11875818869161 + 145301241856 = 3446131^2 + 381184^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021120111017 - 2¹⁶ = 12021120045481 is a prime.

Together with 12021120111019, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021120111017.

It is not a weakly prime, because it can be changed into another prime (12021120111019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560055508 + 6010560055509.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560055509).

Almost surely, 2^{12021120111017} is an apocalyptic number.

It is an amenable number.

12021120111017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021120111017 is an equidigital number, since it uses as much as digits as its factorization.

12021120111017 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 12021120111017 its reverse (71011102112021), we get a palindrome (83032222223038).

The spelling of 12021120111017 in words is "twelve trillion, twenty-one billion, one hundred twenty million, one hundred eleven thousand, seventeen".