11311312311 has 40 divisors (see below), whose sum is σ = 18540355680. Its totient is φ = 6829437888.

The previous prime is 11311312307. The next prime is 11311312343. The reversal of 11311312311 is 11321311311.

11311312311 is a `hidden beast` number, since 11 + 31 + 1 + 312 + 311 = 666.

It is not a de Polignac number, because 11311312311 - 2² = 11311312307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311312391) 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 39 ways as a sum of consecutive naturals, for example, 45531 + ... + 157148.

It is an arithmetic number, because the mean of its divisors is an integer number (463508892).

Almost surely, 2^11311312311 is an apocalyptic number.

11311312311 is a deficient number, since it is larger than the sum of its proper divisors (7229043369).

11311312311 is a wasteful number, since it uses less digits than its factorization.

11311312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202757 (or 202748 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11311312311 its reverse (11321311311), we get a palindrome (22632623622).

The spelling of 11311312311 in words is "eleven billion, three hundred eleven million, three hundred twelve thousand, three hundred eleven".