The traditional Christian God is meant to be omnipotent, omniscient, and omnibolevolent. This would essentially mean that he is the supreme being as he is said to be. However all of these unlimited qualities could not possibly exist together in one individual if they even exist at all.
Let me begin by analyzing the contrasting omnipotence and omnibolevalence. If God is meant to be all powerful, than he is capabable of doing absolutley anything and everything, so does he have the power to sin? By definition yes, but if he does have the power to sin, than he is no longer omnibolevolent. Further more, though this is a seperate paradox, is God capable of concieving a task that even he himself cannot overcome? either way omnipotence of an individual cancels itself out.
On to the limitations of his unlimited powers. If God is omniscient, than he knows everthing, with specific detail. Let's say, for example, numbers are unlimited, God should know every specific number despite the fact that they are unlimited and infinite, rendering the number of numbers incalculable. He must also have knowledge of everting that exists in spatial time, therefore having infinite knowledge as there are an infinite amount of quantum possibilities. God supposedly knows each individual possibility specifically, and he knows that he has information on every one of the infinite possibilities that exist in temporal spatiality and every number that exists despite the fact that they are both infinate and therefore are not collective. He would also know that he knows all of this. We seem to be spinning of endlessly which would be a major problem when relating this to the statistical world of science and measurement, unless we assume that God is ever expanding along with the ever expanding amount of quantum possibilities. An ever expanding enity of truths, which brings us, in some way, back to where we started.