1217107247179 has 2 divisors, whose sum is σ = 1217107247180. Its totient is φ = 1217107247178.

The previous prime is 1217107247149. The next prime is 1217107247197. The reversal of 1217107247179 is 9717427017121.

Together with next prime (1217107247197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217107247179 is a prime.

It is a super-2 number, since 2×1217107247179² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1217107247149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608553623589 + 608553623590.

It is an arithmetic number, because the mean of its divisors is an integer number (608553623590).

Almost surely, 2^{1217107247179} is an apocalyptic number.

1217107247179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217107247179 is an equidigital number, since it uses as much as digits as its factorization.

1217107247179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345744, while the sum is 49.

The spelling of 1217107247179 in words is "one trillion, two hundred seventeen billion, one hundred seven million, two hundred forty-seven thousand, one hundred seventy-nine".