4243113221 has 4 divisors (see below), whose sum is σ = 4389427500. Its totient is φ = 4096798944.

The previous prime is 4243113191. The next prime is 4243113241. The reversal of 4243113221 is 1223113424.

4243113221 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 988410721 + 3254702500 = 31439^2 + 57050^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243113221 - 2⁶ = 4243113157 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 (4243113241) 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, 73157096 + ... + 73157153.

It is an arithmetic number, because the mean of its divisors is an integer number (1097356875).

Almost surely, 2^4243113221 is an apocalyptic number.

It is an amenable number.

4243113221 is a deficient number, since it is larger than the sum of its proper divisors (146314279).

4243113221 is a wasteful number, since it uses less digits than its factorization.

4243113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146314278.

The product of its digits is 1152, while the sum is 23.

The square root of 4243113221 is about 65139.1834535865. The cubic root of 4243113221 is about 1618.9305064364.

Adding to 4243113221 its reverse (1223113424), we get a palindrome (5466226645).

The spelling of 4243113221 in words is "four billion, two hundred forty-three million, one hundred thirteen thousand, two hundred twenty-one".