4243244213021 has 16 divisors (see below), whose sum is σ = 4830610877568. Its totient is φ = 3689505177600.

The previous prime is 4243244212967. The next prime is 4243244213027. The reversal of 4243244213021 is 1203124423424.

It is a happy number.

It is not a de Polignac number, because 4243244213021 - 2¹⁸ = 4243243950877 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 (4243244213027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2853101 + ... + 4077581.

It is an arithmetic number, because the mean of its divisors is an integer number (301913179848).

Almost surely, 2^{4243244213021} is an apocalyptic number.

It is an amenable number.

4243244213021 is a deficient number, since it is larger than the sum of its proper divisors (587366664547).

4243244213021 is a wasteful number, since it uses less digits than its factorization.

4243244213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238212.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 4243244213021 its reverse (1203124423424), we get a palindrome (5446368636445).

The spelling of 4243244213021 in words is "four trillion, two hundred forty-three billion, two hundred forty-four million, two hundred thirteen thousand, twenty-one".