4445001221 has 8 divisors (see below), whose sum is σ = 4520188800. Its totient is φ = 4370163280.

The previous prime is 4445001199. The next prime is 4445001283. The reversal of 4445001221 is 1221005444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4445001221 - 2²⁶ = 4377892357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445001521) 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 7 ways as a sum of consecutive naturals, for example, 61706 + ... + 112683.

It is an arithmetic number, because the mean of its divisors is an integer number (565023600).

Almost surely, 2^4445001221 is an apocalyptic number.

It is an amenable number.

4445001221 is a deficient number, since it is larger than the sum of its proper divisors (75187579).

4445001221 is a wasteful number, since it uses less digits than its factorization.

4445001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174819.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 4445001221 is about 66670.8423600602. The cubic root of 4445001221 is about 1644.2100364734.

Adding to 4445001221 its reverse (1221005444), we get a palindrome (5666006665).

The spelling of 4445001221 in words is "four billion, four hundred forty-five million, one thousand, two hundred twenty-one".