11203312311 has 16 divisors (see below), whose sum is σ = 16600619520. Its totient is φ = 7467471000.

The previous prime is 11203312283. The next prime is 11203312331. The reversal of 11203312311 is 11321330211.

11203312311 is a `hidden beast` number, since 1 + 1 + 20 + 331 + 2 + 311 = 666.

It is not a de Polignac number, because 11203312311 - 2¹¹ = 11203310263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203312331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118936 + ... + 191186.

It is an arithmetic number, because the mean of its divisors is an integer number (1037538720).

Almost surely, 2^11203312311 is an apocalyptic number.

11203312311 is a deficient number, since it is larger than the sum of its proper divisors (5397307209).

11203312311 is an equidigital number, since it uses as much as digits as its factorization.

11203312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78003 (or 77997 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11203312311 its reverse (11321330211), we get a palindrome (22524642522).

The spelling of 11203312311 in words is "eleven billion, two hundred three million, three hundred twelve thousand, three hundred eleven".