1217107247149 has 2 divisors, whose sum is σ = 1217107247150. Its totient is φ = 1217107247148.

The previous prime is 1217107247087. The next prime is 1217107247179. The reversal of 1217107247149 is 9417427017121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991000340100 + 226106907049 = 995490^2 + 475507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217107247149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217107247099 and 1217107247108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217107247179) 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, 608553623574 + 608553623575.

It is an arithmetic number, because the mean of its divisors is an integer number (608553623575).

Almost surely, 2^{1217107247149} is an apocalyptic number.

It is an amenable number.

1217107247149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217107247149 is an equidigital number, since it uses as much as digits as its factorization.

1217107247149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 46.

The spelling of 1217107247149 in words is "one trillion, two hundred seventeen billion, one hundred seven million, two hundred forty-seven thousand, one hundred forty-nine".