111181111

Properties

Appears in sequences

• Palindromic primes whose digits do not appear in previous term and that are increasing.at n=13A030286
• Smallest prime beginning and ending in exactly n 1's and containing at least one digit != 1.at n=4A068160
• Tetradic primes (primes in A006072).at n=13A068188
• Smallest zero-free palindromic prime of 2n + 1 digits.at n=4A071606
• Palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r*(10^d - 1)/9 + (m-r)*10^floor(d/2) where d is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.at n=28A077798
• Smallest palindromic prime containing exactly n 1's.at n=7A083972
• a(1) = 11; for n > 1, palindromic primes in which a single digit is sandwiched between strings of '1's.at n=10A088281
• Palindromic primes p(k) = palprime(k) such that their sum of digits ("sod") equals sum of digits of their palprime index k.at n=15A176465
• Primes that are the concatenation of n 1's, 2*n and n 1's.at n=1A262399
• a(n) = (10^(2*n+1) - 1)/9 + 7*10^n.at n=4A332118
• a(n) is the first prime that starts and ends with at least n 1's (in base 10).at n=3A366416
• Palindromic prime numbers that consist only of the digits {0,1,6,8,9} and which remain palindromic primes when their digits are rotated by 180 degrees.at n=25A370447
• Prime numbersat n=6366988