In [1]: %timeit 11
10000000 loops, best of 3: 39.7 ns per loop

In [2]: %timeit '11'
10000000 loops, best of 3: 39.5 ns per loop

In [3]: %timeit 111
10000000 loops, best of 3: 39.1 ns per loop

In [4]: %timeit '111'
10000000 loops, best of 3: 39.3 ns per loop

In [5]: %timeit '1'
10000000 loops, best of 3: 40.5 ns per loop

In [6]: %timeit 1
10000000 loops, best of 3: 37.7 ns per loop