243121245330 has 16 divisors (see below), whose sum is σ = 583490988864. Its totient is φ = 64832332080.

The previous prime is 243121245287. The next prime is 243121245331. The reversal of 243121245330 is 33542121342.

243121245330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 8104041511 = 243121245330 / (2 + 4 + 3 + 1 + 2 + 1 + 2 + 4 + 5 + 3 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243121245331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4052020726 + ... + 4052020785.

It is an arithmetic number, because the mean of its divisors is an integer number (36468186804).

Almost surely, 2^243121245330 is an apocalyptic number.

243121245330 is an abundant number, since it is smaller than the sum of its proper divisors (340369743534).

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

243121245330 is a wasteful number, since it uses less digits than its factorization.

243121245330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8104041521.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 243121245330 its reverse (33542121342), we get a palindrome (276663366672).

The spelling of 243121245330 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, three hundred thirty".