what type to choose for numeric values ​​from 21 characters long?

Question

MySQL

Google gives the user id with a digital value of 21 characters
in which field to store such data in order to select the user relatively quickly using it.
Thank you.

Answer 1

In strings store, select char, fixed. The muscle is quite good at digesting fixed-length strings.

Answer 2

bigint
BIGINT[(M)] [UNSIGNED] [ZEROFILL]
Large integer. The signed range is from -9223372036854775808 to 9223372036854775807. The unsigned range is from 0 to 18446744073709551615. For BIGINT columns, there are a few things to consider:

Answer 3

maybe crc32(id)?

Answer 4

In C# you can "System.Numerics.BigInteger".

Answer 5

Split into two columns, eg. INT+BIGINT