What is the highest level you can be on Skyrim?
The highest level you can be on Skyrim is level 81. There is a hard cap of Level 81, tested on the PC version by using a cheat to max out all skills. There's no way one can advance further than that.
you can get up to level 100 but it takes a long time between levels after level 80 and not many people get to 100 in one game.