4244212221 has 16 divisors (see below), whose sum is σ = 5730056640. Its totient is φ = 2793956480.

The previous prime is 4244212213. The next prime is 4244212289. The reversal of 4244212221 is 1222124424.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4244212221 - 2³ = 4244212213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4244212191 and 4244212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4244212421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736411 + ... + 742151.

It is an arithmetic number, because the mean of its divisors is an integer number (358128540).

Almost surely, 2^4244212221 is an apocalyptic number.

It is an amenable number.

4244212221 is a deficient number, since it is larger than the sum of its proper divisors (1485844419).

4244212221 is a wasteful number, since it uses less digits than its factorization.

4244212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796.

The product of its digits is 2048, while the sum is 24.

The square root of 4244212221 is about 65147.6186901716. The cubic root of 4244212221 is about 1619.0702663208.

Adding to 4244212221 its reverse (1222124424), we get a palindrome (5466336645).

The spelling of 4244212221 in words is "four billion, two hundred forty-four million, two hundred twelve thousand, two hundred twenty-one".