A 1 quadrillion sided shape would be known as a chiliagon. The prefix "chilio-" denotes 1,000 in the Greek numerical system, so a chiliagon would have 1,000 sides. In geometry, a chiliagon is a regular polygon with 1,000 equal sides and 1,000 equal angles. It is a highly theoretical shape and not commonly encountered in practical applications.
There is no such thing as a 1 sided shape nor a two sided shape.
a 2 sided shape is real but a 1 sided shape is not
a circle
Yes a monogon
Pintigon
Dekingon
Hipintigon
Killigon
a Hecatommyriagon
line
polygon
a pentagon