11131031311 has 4 divisors (see below), whose sum is σ = 11160873592. Its totient is φ = 11101189032.

The previous prime is 11131031293. The next prime is 11131031321. The reversal of 11131031311 is 11313013111.

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-11131031311 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 (11131031321) 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 3 ways as a sum of consecutive naturals, for example, 14920581 + ... + 14921326.

It is an arithmetic number, because the mean of its divisors is an integer number (2790218398).

Almost surely, 2^11131031311 is an apocalyptic number.

11131031311 is a deficient number, since it is larger than the sum of its proper divisors (29842281).

11131031311 is an equidigital number, since it uses as much as digits as its factorization.

11131031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29842280.

The product of its (nonzero) digits is 27, while the sum is 16.

Adding to 11131031311 its reverse (11313013111), we get a palindrome (22444044422).

The spelling of 11131031311 in words is "eleven billion, one hundred thirty-one million, thirty-one thousand, three hundred eleven".