11203051311 has 24 divisors (see below), whose sum is σ = 16705115856. Its totient is φ = 7230424320.

The previous prime is 11203051297. The next prime is 11203051337. The reversal of 11203051311 is 11315030211.

11203051311 is a `hidden beast` number, since 1 + 120 + 30 + 513 + 1 + 1 = 666.

It is not a de Polignac number, because 11203051311 - 2⁷ = 11203051183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203051411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84360 + ... + 171821.

It is an arithmetic number, because the mean of its divisors is an integer number (696046494).

Almost surely, 2^11203051311 is an apocalyptic number.

11203051311 is a deficient number, since it is larger than the sum of its proper divisors (5502064545).

11203051311 is a wasteful number, since it uses less digits than its factorization.

11203051311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256343 (or 256340 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 11203051311 its reverse (11315030211), we get a palindrome (22518081522).

The spelling of 11203051311 in words is "eleven billion, two hundred three million, fifty-one thousand, three hundred eleven".