1111211111

Appears in sequences

• Multiplicative and additive primes: primes where the product and sum of digits are also prime.at n=27A046713
• 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=11A065439
• A nonsense sequence (not well-defined).at n=34A089174
• Prime numbers with prime sum of any two digits.at n=29A091939
• Primes with digital product = 2.at n=8A107612
• Divisors of 1234567890987654321.at n=24A261072
• Triangle-congruent primes greater than 10 with a single digit at the center.at n=0A261510
• Primes that are the concatenation of k 1's, the digits of k^2 + k + 1, and k 1's.at n=2A263299