2011103131 has 4 divisors (see below), whose sum is σ = 2011273264. Its totient is φ = 2010933000.

The previous prime is 2011103093. The next prime is 2011103137. The reversal of 2011103131 is 1313011102.

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-2011103131 is a prime.

It is a super-2 number, since 2×2011103131² = 8089071607036006322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011103137) 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, 65895 + ... + 91456.

It is an arithmetic number, because the mean of its divisors is an integer number (502818316).

Almost surely, 2^2011103131 is an apocalyptic number.

2011103131 is a deficient number, since it is larger than the sum of its proper divisors (170133).

2011103131 is a wasteful number, since it uses less digits than its factorization.

2011103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170132.

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

The square root of 2011103131 is about 44845.3245166093. The cubic root of 2011103131 is about 1262.2482600510.

Adding to 2011103131 its reverse (1313011102), we get a palindrome (3324114233).

The spelling of 2011103131 in words is "two billion, eleven million, one hundred three thousand, one hundred thirty-one".