9122721128 has 64 divisors (see below), whose sum is σ = 17606635200. Its totient is φ = 4429900800.

The previous prime is 9122721077. The next prime is 9122721143. The reversal of 9122721128 is 8211272219.

9122721128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22749728 + ... + 22750128.

It is an arithmetic number, because the mean of its divisors is an integer number (275103675).

Almost surely, 2^9122721128 is an apocalyptic number.

It is an amenable number.

9122721128 is a deficient number, since it is larger than the sum of its proper divisors (8483914072).

9122721128 is a wasteful number, since it uses less digits than its factorization.

9122721128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 926 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 9122721128 is about 95512.9369666748. The cubic root of 9122721128 is about 2089.4956260986.

The spelling of 9122721128 in words is "nine billion, one hundred twenty-two million, seven hundred twenty-one thousand, one hundred twenty-eight".