11101 has 4 divisors (see below), whose sum is σ = 11772.
Its totient is φ = 10432.
The previous prime is 11093. The next prime is 11113. The reversal of 11101 is 10111.
Adding to 11101 its reverse (10111), we get a palindrome (21212).
Subtracting from 11101 its reverse (10111), we obtain a triangular number (990 = T44).
Multipling 11101 by its reverse (10111), we get a palindrome (112242211).
It can be divided in two parts, 1110 and 1, that added together give a palindrome (1111).
11101 = 742 + 752.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 5625 + 5476 = 75^2 + 74^2
It is a cyclic number.
It is not a de Polignac number, because 11101 - 23 = 11093 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11131) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310 + ... + 343.
It is an arithmetic number, because the mean of its divisors is an integer number (2943).
211101 is an apocalyptic number.
11101 is the 75-th centered square number.
It is an amenable number.
11101 is a deficient number, since it is larger than the sum of its proper divisors (671).
11101 is an equidigital number, since it uses as much as digits as its factorization.
11101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 670.
The product of its (nonzero) digits is 1, while the sum is 4.
The square root of 11101 is about 105.3612832116.
The cubic root of 11101 is about 22.3076609043.
The spelling of 11101 in words is "eleven thousand, one hundred one", and thus it is an iban number.