11123311311 has 80 divisors (see below), whose sum is σ = 19895884800. Its totient is φ = 6058608192.

The previous prime is 11123311249. The next prime is 11123311333. The reversal of 11123311311 is 11311332111.

11123311311 is a `hidden beast` number, since 11 + 12 + 331 + 1 + 311 = 666.

It is not a de Polignac number, because 11123311311 - 2⁶ = 11123311247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123311411) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1294716 + ... + 1303278.

It is an arithmetic number, because the mean of its divisors is an integer number (248698560).

Almost surely, 2^11123311311 is an apocalyptic number.

11123311311 is a deficient number, since it is larger than the sum of its proper divisors (8772573489).

11123311311 is an equidigital number, since it uses as much as digits as its factorization.

11123311311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8690 (or 8681 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11123311311 its reverse (11311332111), we get a palindrome (22434643422).

The spelling of 11123311311 in words is "eleven billion, one hundred twenty-three million, three hundred eleven thousand, three hundred eleven".