2011105491 has 8 divisors (see below), whose sum is σ = 2839207824. Its totient is φ = 1261870080.

The previous prime is 2011105489. The next prime is 2011105517. The reversal of 2011105491 is 1945011102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2011105491 - 2¹ = 2011105489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011105091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19716670 + ... + 19716771.

It is an arithmetic number, because the mean of its divisors is an integer number (354900978).

Almost surely, 2^2011105491 is an apocalyptic number.

2011105491 is a deficient number, since it is larger than the sum of its proper divisors (828102333).

2011105491 is a wasteful number, since it uses less digits than its factorization.

2011105491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39433461.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 2011105491 is about 44845.3508292666. The cubic root of 2011105491 is about 1262.2487537941.

Adding to 2011105491 its reverse (1945011102), we get a palindrome (3956116593).

The spelling of 2011105491 in words is "two billion, eleven million, one hundred five thousand, four hundred ninety-one".