2105511011 has 32 divisors (see below), whose sum is σ = 2399362560. Its totient is φ = 1837541376.

The previous prime is 2105510971. The next prime is 2105511043. The reversal of 2105511011 is 1101155012.

It is not a de Polignac number, because 2105511011 - 2²⁶ = 2038402147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105511061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1729475 + ... + 1730691.

It is an arithmetic number, because the mean of its divisors is an integer number (74980080).

Almost surely, 2^2105511011 is an apocalyptic number.

2105511011 is a deficient number, since it is larger than the sum of its proper divisors (293851549).

2105511011 is a wasteful number, since it uses less digits than its factorization.

2105511011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 50, while the sum is 17.

The square root of 2105511011 is about 45885.8476112189. The cubic root of 2105511011 is about 1281.6983906053.

Adding to 2105511011 its reverse (1101155012), we get a palindrome (3206666023).

The spelling of 2105511011 in words is "two billion, one hundred five million, five hundred eleven thousand, eleven".