I have had numbness that lasted for up to 6 months, but it wasn't at a level where I couldn't play piano. My guess is most of your numbness will be gone before a month is over. I think some of the worst numbness I have had on a ride was my feet and that came back in a week. But I never could play piano with my feet.
I had surgery on November 1 and they cut out a nerve to my foot. Apparently it's considered a spare nerve, and surgeons often steal it to fix people's nerves elsewhere. I forget the timeline for it to grow back, but mine is obviously in the process of growing back now. I think that's worse than the numbness you get from riding a bike, but maybe not.
This post made me test my hands, and I have slight numbness in my left pinky. It isn't enough to affect me in any way though. I think that happened 5 years ago, so it's likely permanent