Is it 2 million dollars or 2 millions dollars?

Excuse me, could you please clarify something for me? I'm a bit confused about the usage of the word 'million' in English. When referring to a sum of money, should I say '2 million dollars' or '2 millions dollars'? I've heard both used, but I'm not sure which one is correct. Could you help me out with this? It would be greatly appreciated. I'm trying to write a report and I want to make sure I use the correct terminology." As a professional practitioner in the field of cryptocurrency and finance, I often deal with large sums of money and it's important to me to communicate accurately. The correct usage, as per English grammar rules, is '2 million dollars'. We do not add an 's' to 'million' when it's used to indicate a quantity of money. So, when referring to two million dollars, the correct phrase is '2 million dollars'. Thank you for your assistance in clarifying this for me.