210111221000717 has 2 divisors, whose sum is σ = 210111221000718. Its totient is φ = 210111221000716.

The previous prime is 210111221000699. The next prime is 210111221000741. The reversal of 210111221000717 is 717000122111012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207343037146921 + 2768183853796 = 14399411^2 + 1663786^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111221000717 - 2⁴⁰ = 209011709372941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111221009717) 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, 105055610500358 + 105055610500359.

It is an arithmetic number, because the mean of its divisors is an integer number (105055610500359).

Almost surely, 2^{210111221000717} is an apocalyptic number.

It is an amenable number.

210111221000717 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111221000717 is an equidigital number, since it uses as much as digits as its factorization.

210111221000717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 26.

Adding to 210111221000717 its reverse (717000122111012), we get a palindrome (927111343111729).

The spelling of 210111221000717 in words is "two hundred ten trillion, one hundred eleven billion, two hundred twenty-one million, seven hundred seventeen", and thus it is an aban number.