1217119420417 has 2 divisors, whose sum is σ = 1217119420418. Its totient is φ = 1217119420416.

The previous prime is 1217119420409. The next prime is 1217119420469. The reversal of 1217119420417 is 7140249117121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703189582096 + 513929838321 = 838564^2 + 716889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217119420417 - 2³ = 1217119420409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1217119420417.

It is not a weakly prime, because it can be changed into another prime (1217119420487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608559710208 + 608559710209.

It is an arithmetic number, because the mean of its divisors is an integer number (608559710209).

Almost surely, 2^{1217119420417} is an apocalyptic number.

It is an amenable number.

1217119420417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217119420417 is an equidigital number, since it uses as much as digits as its factorization.

1217119420417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 1217119420417 in words is "one trillion, two hundred seventeen billion, one hundred nineteen million, four hundred twenty thousand, four hundred seventeen".