2011131103 has 4 divisors (see below), whose sum is σ = 2011631608. Its totient is φ = 2010630600.

The previous prime is 2011131079. The next prime is 2011131137. The reversal of 2011131103 is 3011311102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011131103 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 (2011131193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244176 + ... + 252277.

It is an arithmetic number, because the mean of its divisors is an integer number (502907902).

Almost surely, 2^2011131103 is an apocalyptic number.

2011131103 is a deficient number, since it is larger than the sum of its proper divisors (500505).

2011131103 is an equidigital number, since it uses as much as digits as its factorization.

2011131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500504.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2011131103 is about 44845.6363875015. The cubic root of 2011131103 is about 1262.2541121369.

Adding to 2011131103 its reverse (3011311102), we get a palindrome (5022442205).

The spelling of 2011131103 in words is "two billion, eleven million, one hundred thirty-one thousand, one hundred three".