12.11
1221
11,011 is how you write eleven thousand eleven
12111
Eleven and eleven thousandths.
1100.00
12.11
Oh, dude, writing 0.11 in words is like saying "zero point one one." It's not rocket science, it's just reading out the numbers in a decimal. So, like, zero point one one, that's it. Easy peasy lemon squeezy.
1221
11,011 is how you write eleven thousand eleven
11,011,000,011
12111
Eleven and eleven thousandths.
It is 11,12,111
11,011,011
I would write it as either: eleven point zero zero one or eleven and one thousandth
Eleven quadrillion, eleven trillion, eleven billion, eleven million11,011,011,011,000,000