ORACLE 10g number datatype

I created a table called employees with one column named salary with data type NUMBER(11) and then I entered a value into salary of 12345678901 but in o开发者_运维问答utput it values shows like this 1.2345E+10.

Can anyone explain me what this is exactly?

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It is the scientific notation of the number. You may take a look at this article about numeric data types in Oracle.