This number is a prime.
Single Curio View: (Seek other curios for this number)2101243 and 2101247 are the first cousin prime pair of the type p=2^n+2^R(n)-5 and q==2^n+2^R(n)-1, where R(n) is the reversal of n (case n=12). Note that the sums of their digits are another cousin prime pair. [Loungrides]
Submitted: 2009-10-30 05:34:21; Last Modified: 2009-11-02 18:40:24.
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