1. Yes, you can do this. However, it is my understanding and belief that if the $11K tax payment enables you to reach any of the several safe harbors, you would not be required to file Form 2210...
You are never required to fill out form 2210. The IRS is happy to calculate the penalty for you by assuming that your income was spread equally through the year.
However, Cobra is correct that you can still owe a penalty for underpayment even if you reach the safe harbor. See https://www.irs.gov/instructions/i2210
In general, you may owe the penalty for 2020 if the total of your withholding and timely estimated tax payments didn't equal at least the smaller of:
90% of your 2020 tax, or
100% of your 2019 tax. Your 2019 tax return must cover a 12-month period.
The key word there is "timely". Making the full safe-harbor payment as a Q4 estimate won't negate the penalty.
I think the IRS doesn't actually issue penalties in most cases though. I suspect that they really only do the math if they're looking at your return for some other reason or if you filed late and the balance due was a large percentage of the total tax. We get a lot of folks at our Tax-Aide site whose returns get the "might have a penalty" message, and even when I know they actually should owe a penalty, they usually come back the next year and say they never heard anything from the IRS.