11-digit integer literal on a 32-bit CPU

[Patrick Phalen]

I need to assign an 11-digit Transaction ID, according to specs I'm
given by a client.

Begin with 10000000000

Increment by 1 for each new transaction -- 10000000001, etc.

(Store as string in a file between transactions)

As an integer literal, this overflows on an Intel CPU.

What's a nice trick for dealing with this?

Total transactions aren't likely to exceed 999,999