2221320443440 has 160 divisors (see below), whose sum is σ = 6042249271296. Its totient is φ = 743682401280.

The previous prime is 2221320443437. The next prime is 2221320443449. The reversal of 2221320443440 is 443440231222.

It is not an unprimeable number, because it can be changed into a prime (2221320443449) 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, 6085129 + ... + 6439831.

Almost surely, 2^{2221320443440} is an apocalyptic number.

2221320443440 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 2221320443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3021124635648).

2221320443440 is an abundant number, since it is smaller than the sum of its proper divisors (3820928827856).

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

2221320443440 is a wasteful number, since it uses less digits than its factorization.

2221320443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354987 (or 354981 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 2221320443440 its reverse (443440231222), we get a palindrome (2664760674662).

The spelling of 2221320443440 in words is "two trillion, two hundred twenty-one billion, three hundred twenty million, four hundred forty-three thousand, four hundred forty".