4243224121321 has 8 divisors (see below), whose sum is σ = 4390763995080. Its totient is φ = 4095765700992.

The previous prime is 4243224121319. The next prime is 4243224121343. The reversal of 4243224121321 is 1231214223424.

4243224121321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 144883003225 + 4098341118096 = 380635^2 + 2024436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4243224121321 - 2¹ = 4243224121319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243224121361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20257350 + ... + 20465743.

It is an arithmetic number, because the mean of its divisors is an integer number (548845499385).

Almost surely, 2^{4243224121321} is an apocalyptic number.

It is an amenable number.

4243224121321 is a deficient number, since it is larger than the sum of its proper divisors (147539873759).

4243224121321 is a wasteful number, since it uses less digits than its factorization.

4243224121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40726715.

The product of its digits is 18432, while the sum is 31.

Adding to 4243224121321 its reverse (1231214223424), we get a palindrome (5474438344745).

The spelling of 4243224121321 in words is "four trillion, two hundred forty-three billion, two hundred twenty-four million, one hundred twenty-one thousand, three hundred twenty-one".