11211120205 has 4 divisors (see below), whose sum is σ = 13453344252. Its totient is φ = 8968896160.

The previous prime is 11211120131. The next prime is 11211120229. The reversal of 11211120205 is 50202111211.

11211120205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50202111211 = 7 ⋅7171730173.

It can be written as a sum of positive squares in 2 ways, for example, as 1827904516 + 9383215689 = 42754^2 + 96867^2 .

It is not a de Polignac number, because 11211120205 - 2⁷ = 11211120077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121112016 + ... + 1121112025.

It is an arithmetic number, because the mean of its divisors is an integer number (3363336063).

Almost surely, 2^11211120205 is an apocalyptic number.

It is an amenable number.

11211120205 is a deficient number, since it is larger than the sum of its proper divisors (2242224047).

11211120205 is an equidigital number, since it uses as much as digits as its factorization.

11211120205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242224046.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 11211120205 its reverse (50202111211), we get a palindrome (61413231416).

The spelling of 11211120205 in words is "eleven billion, two hundred eleven million, one hundred twenty thousand, two hundred five".