1311131

Properties

Appears in sequences

• Palindromic reflectable primes.at n=23A007616
• Palindromic prime concatenated with next palindromic prime is a prime.at n=12A030462
• Palindromic primes with digit sum = 11.at n=6A070831
• Palindromic primes with middle digit 1.at n=10A082436
• Fractal palindromic primes of first order.at n=10A082584
• Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j.at n=21A082945
• Smallest palindromic prime containing exactly n 1's.at n=4A083972
• Smallest palindromic prime built using the palindromes with odd number of digits as central digits.at n=10A087364
• Palindromic primes that yield a prime when sandwiched between two 1's. (Prefixing and suffixing a 1 on both sides yields another palindromic prime.)at n=22A088269
• Palindromic primes that yield a prime when sandwiched between two 7's. (Prefixing and suffixing a 'seven' on both sides yields another pal prime).at n=29A088271
• Palindromes in A090272.at n=9A090271
• Take each palindrome ending in 1, 3, 7, or 9 and find smallest prime formed by the digits of that palindrome, followed by a string of digits, followed by the palindrome again.at n=11A090272
• Primes with digital product = 9.at n=14A107695
• Palindromic primes p such that digit sum of p is a substring.at n=11A109208
• Palindromic primes with both the number of digits and the digit sum also palindromic primes.at n=17A109830
• Palindromic primes in base 4 (written in base 4).at n=26A117699
• Palindromic primes p(k) = palprime(k) such that their sum of digits ("sod") equals sum of digits of their palprime index k.at n=2A176465
• Primes of the form abcdabcd..abcdabc.at n=19A187125
• Smallest palindromic prime containing the n-th palindrome as central digit(s), or 0 if no such prime exists.at n=20A195294
• Palindromic primes whose sum of digits is also a palindromic prime.at n=21A222116