4224312121 has 4 divisors (see below), whose sum is σ = 4247651044. Its totient is φ = 4200973200.

The previous prime is 4224312083. The next prime is 4224312151. The reversal of 4224312121 is 1212134224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797497600 + 3426814521 = 28240^2 + 58539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4224312121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4224312092 and 4224312101.

It is not an unprimeable number, because it can be changed into a prime (4224312151) 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, 11669190 + ... + 11669551.

It is an arithmetic number, because the mean of its divisors is an integer number (1061912761).

Almost surely, 2^4224312121 is an apocalyptic number.

It is an amenable number.

4224312121 is a deficient number, since it is larger than the sum of its proper divisors (23338923).

4224312121 is a wasteful number, since it uses less digits than its factorization.

4224312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23338922.

The product of its digits is 768, while the sum is 22.

The square root of 4224312121 is about 64994.7084076850. The cubic root of 4224312121 is about 1616.5358227946.

Adding to 4224312121 its reverse (1212134224), we get a palindrome (5436446345).

The spelling of 4224312121 in words is "four billion, two hundred twenty-four million, three hundred twelve thousand, one hundred twenty-one".