has money coming out of her ass ... she's raked in sex tape royalties totaling more than $100k in just 2 months!
TMZ broke the story ... the "Teen Mom
" turned porn star inked a 6-figure upfront deal with Vivid to sell the XXX tape she shot with James Deen
-- "Back Door Teen Mom
TMZ has obtained Farrah's first royalty check -- a percentage of profits she receives from sales. So prepare yourself ... after two months, Farrah amassed $119,576.39
You may recall ... Farah told us on "TMZ Live"
... she's already a millionaire
Feel free to burn those college degrees in 3 ... 2 ... 1 ...