Diversified conglomerate ITC Ltd on Friday reported a 21.27 per cent increase in its net profit at Rs 1,836.42 crore for the second quarter ended 30 September, over the same period of previous fiscal.The company had posted a net profit of Rs 1,514.31 crore for the same period of previous financial year, ITC Ltd said in a filing to the BSE.Net sales of the company rose to Rs 7,146 crore for the second quarter, as against Rs 5,974.18 crore during the corresponding period of 2011-12 fiscal.