112111

Properties

Appears in sequences

• Primes that contain digits 1 and 2 only.at n=12A020450
• Primes having only {0, 1, 2} as digits.at n=34A036953
• Multiplicative primes: product of digits is a prime.at n=25A046703
• Multiplicative and additive primes: primes where the product and sum of digits are also prime.at n=16A046713
• Primes whose decimal expansion is a concatenation of two or more consecutive decreasing numbers (no leading zeros allowed).at n=15A052088
• Primes formed by concatenating k with k-1.at n=13A052089
• Numbers n such that sum of digits and product of digits are both prime.at n=29A052430
• Coefficients of monic primitive irreducible polynomials over GF(3) listed in lexicographic order.at n=29A058949
• Largest prime that is a concatenation of the parts of a partition of n, or 0 if no such prime exists.at n=6A069869
• Leftmost 1 is converted to a 2, which then propagates one step at a time until it is rightmost; then it changes to a pair of 1's and the process repeats.at n=24A071762
• Duplicate of A069869.at n=6A079841
• Non-palindromic primes which on subtracting their reversal give perfect squares.at n=27A080177
• Smallest prime obtained by sandwiching n between a number with identical digits, or 0 if no such prime exists. Primes of the form k n k where all the digits of k are identical.at n=21A090287
• Prime numbers with prime sum of any two digits.at n=19A091939
• Near-repunit primes.at n=35A105992
• Primes with maximal digit = 2.at n=30A106100
• Primes with digital product = 2.at n=5A107612
• Irregular triangle in which the n-th row contains all primes having digit sum n (not containing the digit '0') in increasing order.at n=41A113625
• Let f(n) be the number of sequences of 1's and 2's which sum to n. Sequence contains the string of sequences.at n=49A114034
• Prime numbers for which the product of the digits is a noncomposite number.at n=26A117835