4221221204 has 12 divisors (see below), whose sum is σ = 7488331284. Its totient is φ = 2081697984.

The previous prime is 4221221197. The next prime is 4221221287. The reversal of 4221221204 is 4021221224.

It can be written as a sum of positive squares in 2 ways, for example, as 1299602500 + 2921618704 = 36050^2 + 54052^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7227827 + ... + 7228410.

It is an arithmetic number, because the mean of its divisors is an integer number (624027607).

Almost surely, 2^4221221204 is an apocalyptic number.

It is an amenable number.

4221221204 is a deficient number, since it is larger than the sum of its proper divisors (3267110080).

4221221204 is a wasteful number, since it uses less digits than its factorization.

4221221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456314 (or 14456312 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4221221204 is about 64970.9258361000. The cubic root of 4221221204 is about 1616.1414550594.

Adding to 4221221204 its sum of digits (20), we get a palindrome (4221221224).

Adding to 4221221204 its reverse (4021221224), we get a palindrome (8242442428).

The spelling of 4221221204 in words is "four billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred four".