11021304205 has 4 divisors (see below), whose sum is σ = 13225565052. Its totient is φ = 8817043360.

The previous prime is 11021304181. The next prime is 11021304209. The reversal of 11021304205 is 50240312011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4749139396 + 6272164809 = 68914^2 + 79197^2 .

It is not a de Polignac number, because 11021304205 - 2¹⁷ = 11021173133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021304209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1102130416 + ... + 1102130425.

It is an arithmetic number, because the mean of its divisors is an integer number (3306391263).

Almost surely, 2^11021304205 is an apocalyptic number.

It is an amenable number.

11021304205 is a deficient number, since it is larger than the sum of its proper divisors (2204260847).

11021304205 is an equidigital number, since it uses as much as digits as its factorization.

11021304205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204260846.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 11021304205 its reverse (50240312011), we get a palindrome (61261616216).

The spelling of 11021304205 in words is "eleven billion, twenty-one million, three hundred four thousand, two hundred five".