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The Number 211

211 is a Centered Decagonal Number.

211 is a Centered 14-gonal Number.

211 is a Centered 21-gonal Number.

211 is a Centered 35-gonal Number.

211 is the maximal number of regions into which 20 lines divide a plane.

2-1-1 is a special abbreviated telephone number reserved in Canada and the United States as an easy-to-remember three-digit telephone number meant to provide quick information and referrals to health and human service organizations.

The Year 211 AD

In the year 211 AD Septimus Severus died in Britain.

In the year 211 AD the city of York became the capital of Britannia Inferior, a northern province of the Roman Empire.

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