12211

+ The smallest prime from consecutive initial digits of the Kolakoski sequence consisting just of 1's and 2's. It has a prime number of digits, and a prime sum of digits. [Post]

+ The smallest reverse limerick rhyme scheme prime, i.e., the reversal of aabba. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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