Jason Bateman stated that this is his favorite film he has ever worked on.
Director Henry Alex Rubin had always intended the title to be just a noun and was surprised by people who interpreted it as an imperative and a message from the film, saying "Disconnect [from the Internet]!"
When Mike Dixon is looking through the Hull's pictures, there is a picture from Derek Hull's Marine days, which was clearly a photo of Alexander Skarsgård with former marine Eric Kocher, while they were working on HBO's Generation Kill (2008). The photo after is also a picture of the cast of Generation Kill, and many of the actors from the show can be identified.
At the 9:00 mark, Jason names the band Sigur Rós. An Icelandic band. Then during the final scene they play Tornado by Jónsi, who is the singer of Sigur Rós.
Alexander Skarsgård; who's character's identity is stolen and Mikael Nyqvist who was the supposed identity thief are both from Stockholm, Sweden.