8811221188 has 96 divisors (see below), whose sum is σ = 19844858880. Its totient is φ = 3323928960.

The previous prime is 8811221173. The next prime is 8811221191.

8811221188 is nontrivially palindromic in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 8811221188.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1213906 + ... + 1221142.

It is an arithmetic number, because the mean of its divisors is an integer number (206717280).

Almost surely, 2^8811221188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8811221188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9922429440).

8811221188 is an abundant number, since it is smaller than the sum of its proper divisors (11033637692).

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

8811221188 is a wasteful number, since it uses less digits than its factorization.

8811221188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385 (or 7383 counting only the distinct ones).

The product of its digits is 16384, while the sum is 40.

The square root of 8811221188 is about 93868.1052754342. The cubic root of 8811221188 is about 2065.4373891899.

The spelling of 8811221188 in words is "eight billion, eight hundred eleven million, two hundred twenty-one thousand, one hundred eighty-eight".