4422001221 has 64 divisors (see below), whose sum is σ = 7277568000. Its totient is φ = 2631320640.

The previous prime is 4422001219. The next prime is 4422001237. The reversal of 4422001221 is 1221002244.

4422001221 is a `hidden beast` number, since 442 + 2 + 0 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 4422001221 - 2¹ = 4422001219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4422001194 and 4422001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4422001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5372616 + ... + 5373438.

It is an arithmetic number, because the mean of its divisors is an integer number (113712000).

Almost surely, 2^4422001221 is an apocalyptic number.

It is an amenable number.

4422001221 is a deficient number, since it is larger than the sum of its proper divisors (2855566779).

4422001221 is a wasteful number, since it uses less digits than its factorization.

4422001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4422001221 is about 66498.1294548952. The cubic root of 4422001221 is about 1641.3692239916.

Adding to 4422001221 its reverse (1221002244), we get a palindrome (5643003465).

The spelling of 4422001221 in words is "four billion, four hundred twenty-two million, one thousand, two hundred twenty-one".