It would be hard to actually draw one, but if you can imagine it, and there is no inherent contradiction in the idea, then I would say, "yes".
Hecatommyriagon
A million sided shape is called a Megagon.
hegragentonamionhegon
heptagon * * * * * No. That is a 7 sided figure. A 17 sided figure is a heptadecagon.
bob the builder
A ten sided figure is a decahedron.
An eight sided figure is an octagon.
A six sided figure is called a hexagon.
A six sided figure is called a hexagon.
a twlve sided figure is calles a pentogram
Icosagon is a 20 sided figure.
1200 sided figure is chiliadihectagon