128004509221 has 8 divisors (see below), whose sum is σ = 137557085760. Its totient is φ = 118676699328.

The previous prime is 128004509219. The next prime is 128004509231. The reversal of 128004509221 is 122905400821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128004509221 - 2¹ = 128004509219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128004509201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56190481 + ... + 56192758.

It is an arithmetic number, because the mean of its divisors is an integer number (17194635720).

Almost surely, 2^128004509221 is an apocalyptic number.

It is an amenable number.

128004509221 is a deficient number, since it is larger than the sum of its proper divisors (9552576539).

128004509221 is a wasteful number, since it uses less digits than its factorization.

128004509221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112383323.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 128004509221 in words is "one hundred twenty-eight billion, four million, five hundred nine thousand, two hundred twenty-one".