A lakh is equal to 100,000, one tenth of million, or 105. It is used in the Indian naming system. 100 lakh is one crore. Larger numbers are sometimes combinations of both, a lakh crore for example equal to one trillion. Aarex Tiaokhiao calls this number qoonol, 5-noogol, or goonaoltrult, and it's equal to a(10,100,0)x[3] in Aarex's Array Notation. Username5243 calls this number niloogolduplex or gooqnol, and it's equal to 10[1]5 in Username5243's Array Notation.