11555023321011 has 32 divisors (see below), whose sum is σ = 15721080094720. Its totient is φ = 7547786717184.

The previous prime is 11555023321003. The next prime is 11555023321123. The reversal of 11555023321011 is 11012332055511.

It is not a de Polignac number, because 11555023321011 - 2³ = 11555023321003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11555023321011.

It is not an unprimeable number, because it can be changed into a prime (11555023320011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110038350 + ... + 110143308.

It is an arithmetic number, because the mean of its divisors is an integer number (491283752960).

Almost surely, 2^{11555023321011} is an apocalyptic number.

11555023321011 is a deficient number, since it is larger than the sum of its proper divisors (4166056773709).

11555023321011 is a wasteful number, since it uses less digits than its factorization.

11555023321011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108835.

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 11555023321011 its reverse (11012332055511), we get a palindrome (22567355376522).

The spelling of 11555023321011 in words is "eleven trillion, five hundred fifty-five billion, twenty-three million, three hundred twenty-one thousand, eleven".