811122121221118 has 64 divisors (see below), whose sum is σ = 1427359038336000. Its totient is φ = 345546092253600.

The previous prime is 811122121221089. The next prime is 811122121221311.

811122121221118 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311952796 + ... + 314542192.

It is an arithmetic number, because the mean of its divisors is an integer number (22302484974000).

Almost surely, 2^{811122121221118} is an apocalyptic number.

811122121221118 is a deficient number, since it is larger than the sum of its proper divisors (616236917114882).

811122121221118 is a wasteful number, since it uses less digits than its factorization.

811122121221118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592150 (or 2592136 counting only the distinct ones).

The product of its digits is 2048, while the sum is 34.

The spelling of 811122121221118 in words is "eight hundred eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred eighteen".