From the Canon USA YouTube Video:
The 120MXS is an ultra-high resolution CMOS sensor with 13280 x 9184 effective pixels(approx. 60x the resolution of Full HD). It has a size equivalent to APS-H (29.22mm x 20.20mm), and a square pixel arrangement of 2.2µm x 2.2µm with 122 million effective pixels. Ultra-high-resolution is made possible by parallel signal processing, which reads signals at high speed from multiple pixels. All pixel progressive reading of 9.4fps is made possible by 28 digital signal output channels. It is available in RGB or with twice the sensitivity, in monochrome.