221201202110017 has 2 divisors, whose sum is σ = 221201202110018. Its totient is φ = 221201202110016.

The previous prime is 221201202109967. The next prime is 221201202110039. The reversal of 221201202110017 is 710011202102122.

It is an a-pointer prime, because the next prime (221201202110039) can be obtained adding 221201202110017 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214365440218176 + 6835761891841 = 14641224^2 + 2614529^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201202110017 - 2¹¹ = 221201202107969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221201202110017.

It is not a weakly prime, because it can be changed into another prime (221201202119017) 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, 110600601055008 + 110600601055009.

It is an arithmetic number, because the mean of its divisors is an integer number (110600601055009).

Almost surely, 2^{221201202110017} is an apocalyptic number.

It is an amenable number.

221201202110017 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201202110017 is an equidigital number, since it uses as much as digits as its factorization.

221201202110017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 221201202110017 its reverse (710011202102122), we get a palindrome (931212404212139).

The spelling of 221201202110017 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred two million, one hundred ten thousand, seventeen".