4421321320 has 128 divisors (see below), whose sum is σ = 10891843200. Its totient is φ = 1605528576.

The previous prime is 4421321309. The next prime is 4421321323. The reversal of 4421321320 is 231231244.

It is a junction number, because it is equal to n+sod(n) for n = 4421321291 and 4421321300.

It is not an unprimeable number, because it can be changed into a prime (4421321323) 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, 12741387 + ... + 12741733.

It is an arithmetic number, because the mean of its divisors is an integer number (85092525).

Almost surely, 2^4421321320 is an apocalyptic number.

4421321320 is a gapful number since it is divisible by the number (40) 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 4421321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5445921600).

4421321320 is an abundant number, since it is smaller than the sum of its proper divisors (6470521880).

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

4421321320 is a wasteful number, since it uses less digits than its factorization.

4421321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 4421321320 is about 66493.0170769834. The cubic root of 4421321320 is about 1641.2850972414.

Adding to 4421321320 its reverse (231231244), we get a palindrome (4652552564).

The spelling of 4421321320 in words is "four billion, four hundred twenty-one million, three hundred twenty-one thousand, three hundred twenty".