1101811 has 2 divisors, whose sum is σ = 1101812. Its totient is φ = 1101810.

The previous prime is 1101803. The next prime is 1101839. The reversal of 1101811 is 1181011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101811 - 2³ = 1101803 is a prime.

1101811 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1101791 and 1101800.

It is not a weakly prime, because it can be changed into another prime (1101851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550905 + 550906.

It is an arithmetic number, because the mean of its divisors is an integer number (550906).

2^1101811 is an apocalyptic number.

1101811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101811 is an equidigital number, since it uses as much as digits as its factorization.

1101811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

The square root of 1101811 is about 1049.6718534857. The cubic root of 1101811 is about 103.2846307665.

Adding to 1101811 its reverse (1181011), we get a palindrome (2282822).

The spelling of 1101811 in words is "one million, one hundred one thousand, eight hundred eleven".