What camera resolutions does LeTV S1 Max feature?

Here are details about the LeTV S1 Max's camera sensors:
Rear Camera : 21.5 megapixel
Front Camera : 4.1 megapixel
Flash : Yes
Camera Options :
+ Autofocus
+ Continuous shooting
+ Digital zoom
+ Exposure compensation
+ Face detection
+ Geotagging
+ HDR
+ ISO settings
+ Macro mode
+ Optical image stabilization
+ Panorama
+ Scene mode
+ Self-timer
+ Touch focus
+ White balance settings
Slow Motion Video : Yes , 120.0 fps