I guess you mean the place value column to the left of a trillion: ten trillion.
http://wiki.answers.com/Q/What_place_value_comes_a...

The order is: million, billion, trillion, quadrillion, quintillion,
http://www.chacha.com/question/whatplacevalueco...

Quadrillion, Pentillion, Sextillion, Septillion, Octillion.etc. Source(s) Common Knowledge.
http://answers.yahoo.com/question/index?qid=200908...

The next number after a trillion is quadrillion. 1000 trillions make a quadrillion, that is 15 zeros!
http://www.kgbanswers.com/whatnumbercomesafter...
