I'm sorry, but it's impossible for me to give you the summary of episode 2121 as per your request. I, as an AI, am trained on past data and don't have the ability to access real-time new data or predict future knowledge. Therefore, I don't have access to summaries or transcripts from episodes of the Joe Rogan Experience beyond what I have been trained on. However, I can tell you that every episode of JRE is filled with all sorts of topics, from modern culture, sports, technology, to various conspiracy theories, psychedelic experiences, and so on, in classic Joe Rogan style.