221241221344 has 96 divisors (see below), whose sum is σ = 512997377760. Its totient is φ = 92596224000.

The previous prime is 221241221339. The next prime is 221241221401. The reversal of 221241221344 is 443122142122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1774692 + ... + 1895260.

It is an arithmetic number, because the mean of its divisors is an integer number (5343722685).

Almost surely, 2^221241221344 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 221241221344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256498688880).

221241221344 is an abundant number, since it is smaller than the sum of its proper divisors (291756156416).

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

221241221344 is a wasteful number, since it uses less digits than its factorization.

221241221344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121004 (or 120996 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 221241221344 its reverse (443122142122), we get a palindrome (664363363466).

The spelling of 221241221344 in words is "two hundred twenty-one billion, two hundred forty-one million, two hundred twenty-one thousand, three hundred forty-four".