221130134432 has 96 divisors (see below), whose sum is σ = 461318457600. Its totient is φ = 104049792000.

The previous prime is 221130134429. The next prime is 221130134441. The reversal of 221130134432 is 234431031122.

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, 66987182 + ... + 66990482.

It is an arithmetic number, because the mean of its divisors is an integer number (4805400600).

Almost surely, 2^221130134432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221130134432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230659228800).

221130134432 is an abundant number, since it is smaller than the sum of its proper divisors (240188323168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221130134432 is a wasteful number, since it uses less digits than its factorization.

221130134432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030 (or 4022 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 221130134432 its reverse (234431031122), we get a palindrome (455561165554).

The spelling of 221130134432 in words is "two hundred twenty-one billion, one hundred thirty million, one hundred thirty-four thousand, four hundred thirty-two".