1101 has 4 divisors (see below), whose sum is σ = 1472. Its totient is φ = 732.

The previous prime is 1097. The next prime is 1103. The reversal of 1101 is 1011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1011 = 3 ⋅337.

It is not a de Polignac number, because 1101 - 2^{2} = 1097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (3), and also a Moran number because the ratio is a prime number: 367 = 1101 / (1 + 1 + 0 + 1).

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1101 is a lucky number.

It is a plaindrome in base 12, base 13, base 14 and base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181 + ... + 186.

It is an arithmetic number, because the mean of its divisors is an integer number (368).

It is an amenable number.

1101 is a deficient number, since it is larger than the sum of its proper divisors (371).

1101 is an equidigital number, since it uses as much as digits as its factorization.

1101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 1, while the sum is 3.

The square root of 1101 is about 33.1813200461. The cubic root of 1101 is about 10.3259283287.

Adding to 1101 its reverse (1011), we get a palindrome (2112).

Multiplying 1101 by its reverse (1011), we get a palindrome (1113111).

It can be divided in two parts, 110 and 1, that added together give a palindrome (111).

The spelling of 1101 in words is "one thousand, one hundred one", and thus it is an iban number.

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