11321123311 has 4 divisors (see below), whose sum is σ = 11480575824. Its totient is φ = 11161670800.

The previous prime is 11321123309. The next prime is 11321123323. The reversal of 11321123311 is 11332112311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11321123311 - 2¹ = 11321123309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321123111) 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, 79726150 + ... + 79726291.

It is an arithmetic number, because the mean of its divisors is an integer number (2870143956).

Almost surely, 2^11321123311 is an apocalyptic number.

11321123311 is a deficient number, since it is larger than the sum of its proper divisors (159452513).

11321123311 is an equidigital number, since it uses as much as digits as its factorization.

11321123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159452512.

The product of its digits is 108, while the sum is 19.

Adding to 11321123311 its reverse (11332112311), we get a palindrome (22653235622).

The spelling of 11321123311 in words is "eleven billion, three hundred twenty-one million, one hundred twenty-three thousand, three hundred eleven".