221441212240 has 160 divisors (see below), whose sum is σ = 534290981760. Its totient is φ = 85303375872.

The previous prime is 221441212231. The next prime is 221441212247. The reversal of 221441212240 is 42212144122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441212247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90052131 + ... + 90054589.

It is an arithmetic number, because the mean of its divisors is an integer number (3339318636).

Almost surely, 2^221441212240 is an apocalyptic number.

221441212240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221441212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267145490880).

221441212240 is an abundant number, since it is smaller than the sum of its proper divisors (312849769520).

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

221441212240 is a wasteful number, since it uses less digits than its factorization.

221441212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 221441212240 its reverse (42212144122), we get a palindrome (263653356362).

The spelling of 221441212240 in words is "two hundred twenty-one billion, four hundred forty-one million, two hundred twelve thousand, two hundred forty".