Mega is a counting unit, which is not commonly used in mathematics, but is very commonly used in many other fields, especially in physics and computer science. In mathematics, trillions of applications are rare. People seldom use the mathematical figure of trillion to participate in the calculation of various problems and parameters. The mathematical relationship is only 10 million and so on. So, mathematically, one trillion is equal to 1000000.

In the traditional culture of China, "omen" is a mysterious number, which is considered to have auspicious and sacred significance. In the traditional culture of China, "trillion" is often used to represent a large number, such as "trillion people". In the field of science, mega stands for millions of orders of magnitude, which can be used to represent various data and parameters, such as temperature, pressure, conductivity and so on.

The concept of trillion origin:

From the glyph point of view, omen is a hieroglyphic, like a crack caused by tortoise shell burning, indicating the good or bad luck of the ancients when they used tortoise shell to divine. Therefore, the original meaning of omen refers to the cracking of tortoise shell after burning, and later it is extended to the symptoms or signs before things happen, and it becomes a verb to indicate pre-emergence.

In addition, the usage of trillion as a number may start from the financial field and be used to represent a large amount of money, and then gradually expand to other fields. In computer science, people call 1024 bytes 1KB, 1024KB 1MB, 1024MB 1GB,1024 GB/kloc-.