121001

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 5x + 4.at n=16A023314
• Primes whose sum of digits is 5.at n=33A062341
• Primes of the form n^2*totient(n)+1 (or A053191(n) + 1).at n=18A076669
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,6,6,2).at n=6A078968
• Primes whose decimal representation also represents a prime in base 3.at n=20A089981
• Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.at n=22A090834
• a(n) is the first term of the sexy prime quadruple a(n), a(n)+6, a(n)+12 and a(n)+18 that becomes a perfect square if the rightmost digit (1) is removed.at n=6A092445
• Larger of 3 consecutive prime numbers such that p1*p2*p3 + d1 + d2 - 1 = average of twin prime pairs, d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=30A153405
• Primes of the form 1000*k + 1.at n=28A156655
• Primes of the form 10n^2 + 1.at n=32A201709
• Number of partitions p of n such that m(p) <= m(c(p)), where m = minimal multiplicity of parts, and c = conjugate.at n=46A240730
• Pseudoprimes to base 6, written in base 6.at n=27A262103
• Numbers k that are the representation of primes in base 3 and in base 4.at n=20A340290
• Prime numbersat n=11390