4221220032 has 84 divisors (see below), whose sum is σ = 12118762656. Its totient is φ = 1404817920.

The previous prime is 4221220027. The next prime is 4221220051. The reversal of 4221220032 is 2300221224.

4221220032 is a `hidden beast` number, since 422 + 12 + 200 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4221219987 and 4221220014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375193 + ... + 386279.

It is an arithmetic number, because the mean of its divisors is an integer number (144270984).

Almost surely, 2^4221220032 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 4221220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6059381328).

4221220032 is an abundant number, since it is smaller than the sum of its proper divisors (7897542624).

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

4221220032 is a wasteful number, since it uses less digits than its factorization.

4221220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11766 (or 11753 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4221220032 is about 64970.9168166804. The cubic root of 4221220032 is about 1616.1413054883.

Adding to 4221220032 its reverse (2300221224), we get a palindrome (6521441256).

The spelling of 4221220032 in words is "four billion, two hundred twenty-one million, two hundred twenty thousand, thirty-two".