11311230311 has 4 divisors (see below), whose sum is σ = 11480054712. Its totient is φ = 11142405912.

The previous prime is 11311230263. The next prime is 11311230317. The reversal of 11311230311 is 11303211311.

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

It is a cyclic number.

It is not a de Polignac number, because 11311230311 - 2¹⁰ = 11311229287 is a prime.

It is a super-2 number, since 2×11311230311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11311230311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311230317) 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, 84412100 + ... + 84412233.

It is an arithmetic number, because the mean of its divisors is an integer number (2870013678).

Almost surely, 2^11311230311 is an apocalyptic number.

11311230311 is a deficient number, since it is larger than the sum of its proper divisors (168824401).

11311230311 is an equidigital number, since it uses as much as digits as its factorization.

11311230311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168824400.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11311230311 its reverse (11303211311), we get a palindrome (22614441622).

The spelling of 11311230311 in words is "eleven billion, three hundred eleven million, two hundred thirty thousand, three hundred eleven".