This number is a prime.
The smallest prime (emirp) formed from a Pythagorean
quadruple (1-2-2-3). It is also a left-truncatable prime. [Loungrides]
The smallest prime concatenating the sequence of the number
of divisors of n, in this case for n = 1, 2, 3, 4. [Post]
In the penultimate Bible verse (Revelation 22:20), Lord Jesus has an isopsephia value of 1223. [Slattery]
Prime formed from concatenation of the first four terms of the Golomb sequence.
The smallest prime (emirp) obtained by concatenating an integer with the product and sum of its own digits. [Loungrides]
The larger of only two non-titanic primes p, that is the product of a repunit number and all truncations of itself plus two, i.e., 111*11*1+2. Note that the other such prime, 11*1+2, is also emirp. [Loungrides]
Smallest prime formed by concatenating a number with its ordered distinct prime factors. (For 12, they are 2 and 3.) [Sariyar]
(There are 10 curios for this number that have not yet been approved by an editor.)
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