Do explain 1000000 united state dollar note?

The one million dollar bill is a novelty or fantasy note produced by private parties. No one million dollar bill was ever issued by the U.S. Treasury or the Federal Reserve. The largest bill ever produced in the U.S. was the non-circulating $100,000 note. Used strictly for bank to bank exchange. (Woodrow Wilson is the President on the $100,000 bill.)