Or rather, eleven times infinity. Which is, admittedly, still infinite, it's just not the same infinite. That said, physics don't stay the same from universe to universe, so that may not actually be true. Presumably, if there really are infinite universes, then there are also going to be an infinite amount of universes where physics are exactly the same, therefore there are an infinite number of dimensions. However, there are also universes containing only four or six or nine dimensions. There might even be a way of forming a negative dimension in some way our minds can't process, meaning that, theoretically, the number of dimensions could average out to zero.
Here, though, there's magic and mutants and mysticism, so you're going to be confused.