243320124421 has 16 divisors (see below), whose sum is σ = 272243498688. Its totient is φ = 215543708800.

The previous prime is 243320124419. The next prime is 243320124461. The reversal of 243320124421 is 124421023342.

It is a cyclic number.

It is not a de Polignac number, because 243320124421 - 2¹ = 243320124419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243320124421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243320124461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46791 + ... + 699163.

It is an arithmetic number, because the mean of its divisors is an integer number (17015218668).

Almost surely, 2^243320124421 is an apocalyptic number.

It is an amenable number.

243320124421 is a deficient number, since it is larger than the sum of its proper divisors (28923374267).

243320124421 is a wasteful number, since it uses less digits than its factorization.

243320124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653252.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 243320124421 its reverse (124421023342), we get a palindrome (367741147763).

The spelling of 243320124421 in words is "two hundred forty-three billion, three hundred twenty million, one hundred twenty-four thousand, four hundred twenty-one".