I used MMQGIS plugin to change a table of numbers in text format (UN world economic data) which had large values of items like GDP 132000000000 (132 billion) were all converted to -2147483648 which I suppose is the numerical value for missing value or similar. 132 million converts OK but not 132 billion.
The image above illustrates the problem. I started with the table on the right; table on the left is the reslt. I am using QGIS 1.8. How can I fix this?