The number "11111111111111111111111111111" in English is:
"One hundred eleven quadrillion, one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven."
However, typically such a long string of ones might be simply expressed as "a sequence of 27 ones" or "111,111,111,111,111,111,111,111,111" for easier comprehension.