2011205505 has 16 divisors (see below), whose sum is σ = 3234268224. Its totient is φ = 1067196480.

The previous prime is 2011205473. The next prime is 2011205509. The reversal of 2011205505 is 5055021102.

It is not a de Polignac number, because 2011205505 - 2⁵ = 2011205473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011205509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337351 + ... + 343260.

It is an arithmetic number, because the mean of its divisors is an integer number (202141764).

Almost surely, 2^2011205505 is an apocalyptic number.

It is an amenable number.

2011205505 is a deficient number, since it is larger than the sum of its proper divisors (1223062719).

2011205505 is a wasteful number, since it uses less digits than its factorization.

2011205505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680816.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 2011205505 is about 44846.4659142724. The cubic root of 2011205505 is about 1262.2696776847.

Adding to 2011205505 its reverse (5055021102), we get a palindrome (7066226607).

The spelling of 2011205505 in words is "two billion, eleven million, two hundred five thousand, five hundred five".