8121027217 has 2 divisors, whose sum is σ = 8121027218. Its totient is φ = 8121027216.

The previous prime is 8121027163. The next prime is 8121027221. The reversal of 8121027217 is 7127201218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4267224976 + 3853802241 = 65324^2 + 62079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8121027217 is a prime.

It is not a weakly prime, because it can be changed into another prime (8121027287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060513608 + 4060513609.

It is an arithmetic number, because the mean of its divisors is an integer number (4060513609).

Almost surely, 2^8121027217 is an apocalyptic number.

It is an amenable number.

8121027217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121027217 is an equidigital number, since it uses as much as digits as its factorization.

8121027217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 8121027217 is about 90116.7421570487. The cubic root of 8121027217 is about 2010.0351649335.

The spelling of 8121027217 in words is "eight billion, one hundred twenty-one million, twenty-seven thousand, two hundred seventeen".