The number that comes after 999 trillion is 999 trillion and one! You are likely looking for quadrillion, however. After that is quintillion, sextillion and septillion. You can find
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In the short scale, 999 trillion is 999,000,000,000,000, and the number after that is 999,000,000,000,001. In the long scale, 999 trillion is 999,000,000,000,000,000,000, and the
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Quadrillion comes after 999 trillion. Enjoy
http://www.chacha.com/question/whatnumbercomesa...

It is not accurate, but I suppose you are asking what comes after trillions, and the answer is a quadrillions. It goes, millions, billions, trillions, quadrillions, quintillions,
http://answers.yahoo.com/question/index?qid=200901...
