1011100205 has 4 divisors (see below), whose sum is σ = 1213320252. Its totient is φ = 808880160.

The previous prime is 1011100199. The next prime is 1011100229. The reversal of 1011100205 is 5020011101.

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 658486921 + 352613284 = 25661^2 + 18778^2 .

It is not a de Polignac number, because 1011100205 - 2²⁰ = 1010051629 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101110016 + ... + 101110025.

It is an arithmetic number, because the mean of its divisors is an integer number (303330063).

Almost surely, 2^1011100205 is an apocalyptic number.

It is an amenable number.

1011100205 is a deficient number, since it is larger than the sum of its proper divisors (202220047).

1011100205 is an equidigital number, since it uses as much as digits as its factorization.

1011100205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202220046.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1011100205 is about 31797.8018894388. The cubic root of 1011100205 is about 1003.6864616343.

Adding to 1011100205 its reverse (5020011101), we get a palindrome (6031111306).

The spelling of 1011100205 in words is "one billion, eleven million, one hundred thousand, two hundred five".