11203311311 has 4 divisors (see below), whose sum is σ = 11205997632. Its totient is φ = 11200624992.

The previous prime is 11203311281. The next prime is 11203311313. The reversal of 11203311311 is 11311330211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11311330211 = 19 ⋅595333169.

It is a cyclic number.

It is not a de Polignac number, because 11203311311 - 2³⁰ = 10129569487 is a prime.

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 11203311311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203311313) 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, 1336895 + ... + 1345248.

It is an arithmetic number, because the mean of its divisors is an integer number (2801499408).

Almost surely, 2^11203311311 is an apocalyptic number.

11203311311 is a deficient number, since it is larger than the sum of its proper divisors (2686321).

11203311311 is an equidigital number, since it uses as much as digits as its factorization.

11203311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686320.

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

Adding to 11203311311 its reverse (11311330211), we get a palindrome (22514641522).

The spelling of 11203311311 in words is "eleven billion, two hundred three million, three hundred eleven thousand, three hundred eleven".