119811 has 4 divisors (see below), whose sum is σ = 159752. Its totient is φ = 79872.

The previous prime is 119809. The next prime is 119813. The reversal of 119811 is 118911.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (119809) and next prime (119813).

It is not a de Polignac number, because 119811 - 2¹ = 119809 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 119811.

It is not an unprimeable number, because it can be changed into a prime (119813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19966 + ... + 19971.

It is an arithmetic number, because the mean of its divisors is an integer number (39938).

2¹¹⁹⁸¹¹ is an apocalyptic number.

119811 is a deficient number, since it is larger than the sum of its proper divisors (39941).

119811 is an equidigital number, since it uses as much as digits as its factorization.

119811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39940.

The product of its digits is 72, while the sum is 21.

The square root of 119811 is about 346.1372560127. The cubic root of 119811 is about 49.2983326529.

Subtracting from 119811 its reverse (118911), we obtain a square (900 = 30²).

The spelling of 119811 in words is "one hundred nineteen thousand, eight hundred eleven".