1111111121

Appears in sequences

• Smallest n-digit prime containing only digits 1 or 2 or -1 if no such prime exists.at n=9A036229
• Smallest prime containing exactly n 1's.at n=9A037055
• Multiplicative and additive primes: primes where the product and sum of digits are also prime.at n=26A046713
• Start with the prime 11; next prime must exceed previous prime, contain no 0's and start with last digit of previous prime.at n=17A053649
• Numbers n such that s[n], p[n] and s[n]+p[n] are all prime numbers, where s[n] is the sum of digits of n and p[n] is the product of digits of n.at n=7A065439
• Smallest n-digit prime in which the k-th digit is a divisor or a multiple of k, or 0 if no such prime exists.at n=9A069574
• a(1) = 1, then the smallest number not included earlier and not a string of 1's such that the concatenation a(n), a(n+1) is a palindrome.at n=29A083122
• Smallest prime in which a digit appears n times.at n=8A084673
• Prime numbers with prime sum of any two digits.at n=27A091939
• Prime following n-th repunit.at n=9A096497
• Primes with digital product = 2.at n=7A107612
• (Digit 1 repeated n times) + n.at n=9A110369
• Sophie Germain primes for which the product of the digits is also a Sophie Germain prime.at n=7A118505
• a(n) is the smallest integer that contains a(n-1) but does not begin with a(n-1).at n=9A179956
• Smallest prime with length n having at least n-1 identical digits.at n=9A241100
• Lesser of two consecutive primes such that the product of its digits is also prime and the sum of the digits of the other is composite.at n=16A370848
• a(n) is the smallest n-digit zeroless prime.at n=9A384873