221128460288 has 36 divisors (see below), whose sum is σ = 442191502935. Its totient is φ = 110553589760.

The previous prime is 221128460281. The next prime is 221128460291. The reversal of 221128460288 is 882064821122.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 110564230144 + 110564230144 = 332512^2 + 332512^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332512.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221128460281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 21275573 + ... + 21285963.

Almost surely, 2^221128460288 is an apocalyptic number.

It is an amenable number.

221128460288 is a deficient number, since it is larger than the sum of its proper divisors (221063042647).

221128460288 is an frugal number, since it uses more digits than its factorization.

221128460288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20804 (or 10393 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 221128460288 in words is "two hundred twenty-one billion, one hundred twenty-eight million, four hundred sixty thousand, two hundred eighty-eight".