210111221009717 has 2 divisors, whose sum is σ = 210111221009718. Its totient is φ = 210111221009716.

The previous prime is 210111221009659. The next prime is 210111221009743. The reversal of 210111221009717 is 717900122111012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143271946579876 + 66839274429841 = 11969626^2 + 8175529^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111221009717 - 2⁶ = 210111221009653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111221009777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055610504858 + 105055610504859.

It is an arithmetic number, because the mean of its divisors is an integer number (105055610504859).

Almost surely, 2^{210111221009717} is an apocalyptic number.

It is an amenable number.

210111221009717 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111221009717 is an equidigital number, since it uses as much as digits as its factorization.

210111221009717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 35.

The spelling of 210111221009717 in words is "two hundred ten trillion, one hundred eleven billion, two hundred twenty-one million, nine thousand, seven hundred seventeen".