221301355016 has 96 divisors (see below), whose sum is σ = 491309128800. Its totient is φ = 93151860480.

The previous prime is 221301355013. The next prime is 221301355021. The reversal of 221301355016 is 610553103122.

It is a self number, because there is not a number n which added to its sum of digits gives 221301355016.

It is not an unprimeable number, because it can be changed into a prime (221301355013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30224636 + ... + 30231956.

It is an arithmetic number, because the mean of its divisors is an integer number (5117803425).

Almost surely, 2^221301355016 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 221301355016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245654564400).

221301355016 is an abundant number, since it is smaller than the sum of its proper divisors (270007773784).

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

221301355016 is a wasteful number, since it uses less digits than its factorization.

221301355016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707 (or 8696 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 221301355016 its reverse (610553103122), we get a palindrome (831854458138).

The spelling of 221301355016 in words is "two hundred twenty-one billion, three hundred one million, three hundred fifty-five thousand, sixteen".