11203122311 has 4 divisors (see below), whose sum is σ = 11393005800. Its totient is φ = 11013238824.

The previous prime is 11203122289. The next prime is 11203122341. The reversal of 11203122311 is 11322130211.

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-11203122311 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 11203122311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203122341) 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, 94941656 + ... + 94941773.

It is an arithmetic number, because the mean of its divisors is an integer number (2848251450).

Almost surely, 2^11203122311 is an apocalyptic number.

11203122311 is a deficient number, since it is larger than the sum of its proper divisors (189883489).

11203122311 is an equidigital number, since it uses as much as digits as its factorization.

11203122311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189883488.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11203122311 its reverse (11322130211), we get a palindrome (22525252522).

The spelling of 11203122311 in words is "eleven billion, two hundred three million, one hundred twenty-two thousand, three hundred eleven".