11311 has 2 divisors, whose sum is σ = 11312.
Its totient is φ = 11310.
The previous prime is 11299. The next prime is 11317.
It is a happy number.
11311 is nontrivially palindromic in base 10.
It is a strong prime.
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 11311 - 25 = 11279 is a prime.
It is a plaindrome in base 12.
It is a nialpdrome in base 11.
It is a junction number, because it is equal to n+sod(n) for n = 11294 and 11303.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (11317) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655 + 5656.
It is an arithmetic number, because the mean of its divisors is an integer number (5656).
211311 is an apocalyptic number.
11311 is a deficient number, since it is larger than the sum of its proper divisors (1).
11311 is an equidigital number, since it uses as much as digits as its factorization.
11311 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3, while the sum is 7.
The square root of 11311 is about 106.3531851897.
The cubic root of 11311 is about 22.4474493757.
The spelling of 11311 in words is "eleven thousand, three hundred eleven", and thus it is an iban number.