What is 1000000000000 bytes called?
The term is a terabyte.
1000 megabytes = 1 gigabyte and 1000 gigabytes = 1 terabyte
The prefix for the number 1,000,000,000,000 (one trillion, short scale) is tera- (1000 gigabytes).
1,000 bytes, strictly doesn't have a name. A kilobyte is 1,024 bytes. However, hard drive manufactures round this down to 1,000 bytes, so you can argue that 1,000 bytes is called a kilobyte. Hard Drives that are advertised as 1TB drives often only have 1,000GB, not the 1,024GB they should have by definition... Always read the label!