In the Customize Keyboard dialog, find FileProperties under All Commands and assign a shortcut of Shift-Ctrl-Alt-P

Alt +f           Opens the Office Button

Alt +e           Opens the Prepare options

Alt +p           Opens the Properties
ALT+F, T         Open Word Options

W2010: Alt, F, I, Q, P    Show All Properties
W2010: Alt, F, I, Q, S    Properties

Keyboard shortcuts for Microsoft Word (from Microsoft): https://support.microsoft.com/en-us/kb/290938
KeyRocket: https://www.veodin.com/keyrocket/word-2010-shortcuts/ https://www.veodin.com/keyrocket/word-2007-shortcuts/
MVPS Word: http://word.mvps.org/faqs/general/shortcuts.htm
Shortcut World: http://www.shortcutworld.com/en/win/Word_2013.html