11203312011 has 16 divisors (see below), whose sum is σ = 15124032000. Its totient is φ = 7376181408.

The previous prime is 11203311947. The next prime is 11203312031. The reversal of 11203312011 is 11021330211.

It is a happy number.

It is not a de Polignac number, because 11203312011 - 2⁶ = 11203311947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11203312031) 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 15 ways as a sum of consecutive naturals, for example, 44590 + ... + 156188.

It is an arithmetic number, because the mean of its divisors is an integer number (945252000).

Almost surely, 2^11203312011 is an apocalyptic number.

11203312011 is a deficient number, since it is larger than the sum of its proper divisors (3920719989).

11203312011 is a wasteful number, since it uses less digits than its factorization.

11203312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112018.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11203312011 its reverse (11021330211), we get a palindrome (22224642222).

The spelling of 11203312011 in words is "eleven billion, two hundred three million, three hundred twelve thousand, eleven".