That number is just an example of a specific category of absurd humor. It’s rare to see that sort of thing applied to numbers though. In other situations, we’ve all seen it. Just repeat any dumb thing a hundred times and suddenly it becomes funny. You could look at pretty much any TV comedy. Pick any decade, like 60’s, 70’s, 90’s or whatever. The rule is very simple: Just repeat it and it becomes funny at some point.

You could also say that the seeds of brain rot are older than we dare to admit. The 2020s just distilled it to its purest form yet.