243121242252 has 48 divisors (see below), whose sum is σ = 652616878592. Its totient is φ = 69003187200.

The previous prime is 243121242229. The next prime is 243121242281. The reversal of 243121242252 is 252242121342.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9571093 + ... + 9596460.

Almost surely, 2^243121242252 is an apocalyptic number.

It is an amenable number.

243121242252 is an abundant number, since it is smaller than the sum of its proper divisors (409495636340).

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

243121242252 is a wasteful number, since it uses less digits than its factorization.

243121242252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19167718 (or 19167716 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

Adding to 243121242252 its reverse (252242121342), we get a palindrome (495363363594).

The spelling of 243121242252 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-two thousand, two hundred fifty-two".