Moving page number just for landscape pages

I need to make a formatting edit to a document and frankly I can’t figure out how to do so. Caveat: you’re going to see what I want and say "that’s a terrible idea, don’t do that, it’ll look dumb and confuse the reader!" I agree. It is dumb. It is also not my idea and I don’t have a choice in the matter.

I have several tables in this document that are too wide to be legible, so I flip them using sideways table (could alternatively use landscape). I have been told that I need to move the page number and adjust the margins for these pages and only these pages, so that they stay in the same position relative to the table rather than relative to the reader / the actual page. I have attached a drawing of what they mean, where the left picture is what I have (with the table being sideways and short-and-wide in orientation), and the right is what I am being told to do.

The margins thing is theoretically annoying but also basically solves itself b/c the numbers happen to line up with no change (although if you know how to actually do it, all ears). The page number one, however, is more vexing. I am not aware of any package that handles the page number this way, and googling has not turned up any. (perhaps because it is a bad idea. Alas.) Does anyone know how I would accomplish this?