8111221118 has 128 divisors (see below), whose sum is σ = 17584874496. Its totient is φ = 2699827200.

The previous prime is 8111221117. The next prime is 8111221123.

8111221118 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8111221117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2074121 + ... + 2078027.

It is an arithmetic number, because the mean of its divisors is an integer number (137381832).

Almost surely, 2^8111221118 is an apocalyptic number.

8111221118 is an abundant number, since it is smaller than the sum of its proper divisors (9473653378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8111221118 is a wasteful number, since it uses less digits than its factorization.

8111221118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018.

The product of its digits is 256, while the sum is 26.

The square root of 8111221118 is about 90062.3179692817. The cubic root of 8111221118 is about 2009.2258033382.

The spelling of 8111221118 in words is "eight billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eighteen".