4222440221 has 4 divisors (see below), whose sum is σ = 4239262944. Its totient is φ = 4205617500.

The previous prime is 4222440203. The next prime is 4222440293. The reversal of 4222440221 is 1220442224.

4222440221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4222440221 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 (4222410221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8410985 + ... + 8411486.

It is an arithmetic number, because the mean of its divisors is an integer number (1059815736).

Almost surely, 2^4222440221 is an apocalyptic number.

It is an amenable number.

4222440221 is a deficient number, since it is larger than the sum of its proper divisors (16822723).

4222440221 is a wasteful number, since it uses less digits than its factorization.

4222440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16822722.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 4222440221 is about 64980.3064089421. The cubic root of 4222440221 is about 1616.2970114888.

Adding to 4222440221 its reverse (1220442224), we get a palindrome (5442882445).

The spelling of 4222440221 in words is "four billion, two hundred twenty-two million, four hundred forty thousand, two hundred twenty-one".