These rice cookers are fairly easy to clean and store. The Zojirushi takes the win with storage as the cord is retractable.
Think about where you’re going to store it before you decide on one. They do come in different shapes and size and this can affect storage. If you have a spot picked out before you start shopping you’ll have an estimate of what size will fit best in your kitchen.
As for cleaning, these all come with removable lids and inner pots for easy cleaning. Just clean the pot like you would any other non-stick pot (handwash it please) and same goes for the lid. Make sure to wipe the whole thing down once in a while. The steam and warmth are greenhouses for mildew and bacteria.