Is there a 128-bit processor?

Excuse me, I was wondering if you could clarify something for me. In the realm of computing and digital technology, I've heard of various types of processors with varying bit sizes, but I'm particularly intrigued by the notion of a 128-bit processor. Now, my question is, does such a processor actually exist? If so, could you elaborate on its capabilities and potential applications? I'm genuinely curious about the potential advantages and limitations of this specific type of processor.