811121121121118 has 16 divisors (see below), whose sum is σ = 1228805371820880. Its totient is φ = 401519835984000.

The previous prime is 811121121121111. The next prime is 811121121121139.

811121121121118 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811121121121111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123149888 + ... + 129569043.

It is an arithmetic number, because the mean of its divisors is an integer number (76800335738805).

Almost surely, 2^{811121121121118} is an apocalyptic number.

811121121121118 is a deficient number, since it is larger than the sum of its proper divisors (417684250699762).

811121121121118 is a wasteful number, since it uses less digits than its factorization.

811121121121118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252734923.

The product of its digits is 512, while the sum is 32.

The spelling of 811121121121118 in words is "eight hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred eighteen".