2111809041 has 12 divisors (see below), whose sum is σ = 3069822132. Its totient is φ = 1398904416.

The previous prime is 2111809033. The next prime is 2111809057. The reversal of 2111809041 is 1409081112.

It can be written as a sum of positive squares in 2 ways, for example, as 1063020816 + 1048788225 = 32604^2 + 32385^2 .

It is not a de Polignac number, because 2111809041 - 2³ = 2111809033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111808996 and 2111809014.

It is not an unprimeable number, because it can be changed into a prime (2111809541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745866 + ... + 748691.

It is an arithmetic number, because the mean of its divisors is an integer number (255818511).

Almost surely, 2^2111809041 is an apocalyptic number.

It is an amenable number.

2111809041 is a deficient number, since it is larger than the sum of its proper divisors (958013091).

2111809041 is a wasteful number, since it uses less digits than its factorization.

2111809041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494720 (or 1494717 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 2111809041 is about 45954.4235193958. The cubic root of 2111809041 is about 1282.9750624270.

The spelling of 2111809041 in words is "two billion, one hundred eleven million, eight hundred nine thousand, forty-one".