How much is a trillion dollars? More than you think. Elon Musk has entered the four comma club . The world’s first trillionaire is a man who gave an apparent Nazi salute and proceeded on a cost-cutting rampage through the U.S. federal government, at one point gutting an agency that fed needy children around the world for decades. He also runs SpaceX, the rocket company that made its trading debut on Friday , boosting its value to some $2.21 trillion — up there with Amazon , Apple and Alphabet.