221215500052144 has 120 divisors (see below), whose sum is σ = 489042206795520. Its totient is φ = 96349432283136.

The previous prime is 221215500052123. The next prime is 221215500052171. The reversal of 221215500052144 is 441250005512122.

221215500052144 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13565937 + ... + 25029295.

It is an arithmetic number, because the mean of its divisors is an integer number (4075351723296).

Almost surely, 2^{221215500052144} 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 221215500052144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244521103397760).

221215500052144 is an abundant number, since it is smaller than the sum of its proper divisors (267826706743376).

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

221215500052144 is a wasteful number, since it uses less digits than its factorization.

221215500052144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463675 (or 11463650 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 221215500052144 its reverse (441250005512122), we get a palindrome (662465505564266).

The spelling of 221215500052144 in words is "two hundred twenty-one trillion, two hundred fifteen billion, five hundred million, fifty-two thousand, one hundred forty-four".