8021128225 has 12 divisors (see below), whose sum is σ = 10850399280. Its totient is φ = 5833547600.

The previous prime is 8021128163. The next prime is 8021128249. The reversal of 8021128225 is 5228211208.

It is not a de Polignac number, because 8021128225 - 2⁷ = 8021128097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14583595 + ... + 14584144.

It is an arithmetic number, because the mean of its divisors is an integer number (904199940).

Almost surely, 2^8021128225 is an apocalyptic number.

It is an amenable number.

8021128225 is a deficient number, since it is larger than the sum of its proper divisors (2829271055).

8021128225 is a wasteful number, since it uses less digits than its factorization.

8021128225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29167760 (or 29167755 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 8021128225 is about 89560.7515879584. The cubic root of 8021128225 is about 2001.7591376803.

The spelling of 8021128225 in words is "eight billion, twenty-one million, one hundred twenty-eight thousand, two hundred twenty-five".