8011109721 has 16 divisors (see below), whose sum is σ = 10918427904. Its totient is φ = 5222467584.

The previous prime is 8011109719. The next prime is 8011109749. The reversal of 8011109721 is 1279011108.

It is not a de Polignac number, because 8011109721 - 2¹ = 8011109719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8011109791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137935 + ... + 187211.

It is an arithmetic number, because the mean of its divisors is an integer number (682401744).

Almost surely, 2^8011109721 is an apocalyptic number.

It is an amenable number.

8011109721 is a deficient number, since it is larger than the sum of its proper divisors (2907318183).

8011109721 is a wasteful number, since it uses less digits than its factorization.

8011109721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50480.

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 8011109721 is about 89504.8027817502. The cubic root of 8011109721 is about 2000.9253818515.

The spelling of 8011109721 in words is "eight billion, eleven million, one hundred nine thousand, seven hundred twenty-one".