2111530205 has 8 divisors (see below), whose sum is σ = 2534334432. Its totient is φ = 1688892048.

The previous prime is 2111530177. The next prime is 2111530219. The reversal of 2111530205 is 5020351112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111530205 - 2²⁶ = 2044421341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11579 + ... + 66008.

It is an arithmetic number, because the mean of its divisors is an integer number (316791804).

Almost surely, 2^2111530205 is an apocalyptic number.

It is an amenable number.

2111530205 is a deficient number, since it is larger than the sum of its proper divisors (422804227).

2111530205 is an equidigital number, since it uses as much as digits as its factorization.

2111530205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83035.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2111530205 is about 45951.3895872584. The cubic root of 2111530205 is about 1282.9185934039.

Adding to 2111530205 its reverse (5020351112), we get a palindrome (7131881317).

The spelling of 2111530205 in words is "two billion, one hundred eleven million, five hundred thirty thousand, two hundred five".