Either my age is catching up with me or this particular piece is just hard for me to memorize but.....
Les Yeux Sorciers
by Leo Brouwer is giving me a run for my memorizing money.
I know many musicians no longer work on memorizing pieces. I personally use a large iPad Pro with an AirTurn Pedal now (thank you for the suggestion Michael Partington and David Russell). It works great! Although, my practice sessions now involve some real work learning how to infuse a piece with a valid personal interpretation infused with a proper sprinkle of emotion all while pulling it off of the page.
For years I found that easier to do after memorizing and pondering the composition for a few months.