243121412320 has 48 divisors (see below), whose sum is σ = 575005169088. Its totient is φ = 97141757440.

The previous prime is 243121412291. The next prime is 243121412323. The reversal of 243121412320 is 23214121342.

It is a super-2 number, since 2×243121412320² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121412323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688219 + ... + 979738.

It is an arithmetic number, because the mean of its divisors is an integer number (11979274356).

Almost surely, 2^243121412320 is an apocalyptic number.

243121412320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243121412320 is an abundant number, since it is smaller than the sum of its proper divisors (331883756768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243121412320 is a wasteful number, since it uses less digits than its factorization.

243121412320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668883 (or 1668875 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243121412320 its reverse (23214121342), we get a palindrome (266335533662).

The spelling of 243121412320 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred twelve thousand, three hundred twenty".