4243310021 has 4 divisors (see below), whose sum is σ = 4282967232. Its totient is φ = 4203652812.

The previous prime is 4243310003. The next prime is 4243310063. The reversal of 4243310021 is 1200133424.

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 not a de Polignac number, because 4243310021 - 2¹⁰ = 4243308997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4243309975 and 4243310002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243310081) 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, 19828445 + ... + 19828658.

It is an arithmetic number, because the mean of its divisors is an integer number (1070741808).

Almost surely, 2^4243310021 is an apocalyptic number.

It is an amenable number.

4243310021 is a deficient number, since it is larger than the sum of its proper divisors (39657211).

4243310021 is a wasteful number, since it uses less digits than its factorization.

4243310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39657210.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4243310021 is about 65140.6940475767. The cubic root of 4243310021 is about 1618.9555352758.

Adding to 4243310021 its reverse (1200133424), we get a palindrome (5443443445).

The spelling of 4243310021 in words is "four billion, two hundred forty-three million, three hundred ten thousand, twenty-one".