11,211
Port 11211 is the default port for memcached.
- Odd
- Composite
Where 11,211 fits
Why 11,211 is special
In 2018 exposed memcached servers on UDP port 11211 were used to amplify traffic by a factor of over fifty thousand, producing the largest denial-of-service attacks recorded at the time. The vulnerability was a default that answered small questions with very large answers to anyone who asked.
11,211 is part of
Factors & digit properties
- Divisors (8)
- 1, 3, 37, 101, 111, 303, 3737, 11211
- Prime factorisation
- 3 × 37 × 101
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 11211
- Binary
- 10101111001011
- Octal
- 25713
- Hexadecimal
- 2bcb
- Scientific notation
- 1.121 × 10^4
Other mathematical patterns
- Palindromic number
- Deficient number
Related numbers & connections
memcached and Redis are both in-memory stores designed for trusted networks. Both produced large public incidents when exposed — amplification attacks in one case and direct compromise in the other.
View 6379 →Other connections
- is associated with6379
why?
Strength 0.50, confidence "high".
Technology & computing
In 2018, exposed memcached servers on UDP 11211 were used to amplify attack traffic by a factor above fifty thousand, producing the largest denial-of-service attacks recorded at the time. The flaw was a default willing to answer a tiny question with an enormous answer.
DocumentedTechnology & computing
Common questions
Is 11,211 a prime number?
No, 11,211 is not prime.
What are the factors of 11,211?
The factors of 11,211 are 1, 3, 37, 101, 111, 303, 3737, 11211.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026