2011105261 has 8 divisors (see below), whose sum is σ = 2195849664. Its totient is φ = 1826680320.

The previous prime is 2011105259. The next prime is 2011105301. The reversal of 2011105261 is 1625011102.

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

It is a cyclic number.

It is not a de Polignac number, because 2011105261 - 2¹ = 2011105259 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 (2011105241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66601 + ... + 91966.

It is an arithmetic number, because the mean of its divisors is an integer number (274481208).

Almost surely, 2^2011105261 is an apocalyptic number.

It is an amenable number.

2011105261 is a deficient number, since it is larger than the sum of its proper divisors (184744403).

2011105261 is a wasteful number, since it uses less digits than its factorization.

2011105261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159731.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 2011105261 is about 44845.3482648981. The cubic root of 2011105261 is about 1262.2487056751.

Adding to 2011105261 its reverse (1625011102), we get a palindrome (3636116363).

The spelling of 2011105261 in words is "two billion, eleven million, one hundred five thousand, two hundred sixty-one".