Rush 2112 reference on latest episode of Showtime's Billions

There was a brief Rush 2112 reference on last night's (Season 4, Episode 2 - Arousal Template) episode of the Showtime drama Billions. During one scene, Taylor punches in a 4-digit access code into a keypad to open a door, and the code is - of course - 2-1-1-2 as seen in this tweet (thanks John H). Billions Showrunner Brian Koppelman is a huge Rush fan, and this is not the first time the show has included a Rush reference; last year in episode 9 of season 3, Axe and Taylor spend a portion of one scene debating which is Rush's best album as seen in this post.