4243034021 has 4 divisors (see below), whose sum is σ = 4264356000. Its totient is φ = 4221712044.

The previous prime is 4243034017. The next prime is 4243034041. The reversal of 4243034021 is 1204303424.

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 4243034021 - 2² = 4243034017 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 (4243034011) 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, 10660691 + ... + 10661088.

It is an arithmetic number, because the mean of its divisors is an integer number (1066089000).

Almost surely, 2^4243034021 is an apocalyptic number.

It is an amenable number.

4243034021 is a deficient number, since it is larger than the sum of its proper divisors (21321979).

4243034021 is a wasteful number, since it uses less digits than its factorization.

4243034021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21321978.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 4243034021 is about 65138.5755217291. The cubic root of 4243034021 is about 1618.9204336363.

Adding to 4243034021 its reverse (1204303424), we get a palindrome (5447337445).

The spelling of 4243034021 in words is "four billion, two hundred forty-three million, thirty-four thousand, twenty-one".