1210217117 has 2 divisors, whose sum is σ = 1210217118. Its totient is φ = 1210217116.

The previous prime is 1210217111. The next prime is 1210217119. The reversal of 1210217117 is 7117120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210065796 + 151321 = 34786^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210217117 - 2²⁴ = 1193439901 is a prime.

Together with 1210217119, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210217092 and 1210217101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210217111) 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, 605108558 + 605108559.

It is an arithmetic number, because the mean of its divisors is an integer number (605108559).

Almost surely, 2^1210217117 is an apocalyptic number.

It is an amenable number.

1210217117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210217117 is an equidigital number, since it uses as much as digits as its factorization.

1210217117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 23.

The square root of 1210217117 is about 34788.1749593163. The cubic root of 1210217117 is about 1065.6659685914.

Adding to 1210217117 its reverse (7117120121), we get a palindrome (8327337238).

The spelling of 1210217117 in words is "one billion, two hundred ten million, two hundred seventeen thousand, one hundred seventeen".