243121111436 has 24 divisors (see below), whose sum is σ = 494483619840. Its totient is φ = 102428748432.

The previous prime is 243121111391. The next prime is 243121111447. The reversal of 243121111436 is 634111121342.

It is a junction number, because it is equal to n+sod(n) for n = 243121111399 and 243121111408.

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 7 ways as a sum of consecutive naturals, for example, 73582220 + ... + 73585523.

It is an arithmetic number, because the mean of its divisors is an integer number (20603484160).

Almost surely, 2^243121111436 is an apocalyptic number.

It is an amenable number.

243121111436 is an abundant number, since it is smaller than the sum of its proper divisors (251362508404).

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

243121111436 is a wasteful number, since it uses less digits than its factorization.

243121111436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147167813 (or 147167811 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

Adding to 243121111436 its reverse (634111121342), we get a palindrome (877232232778).

The spelling of 243121111436 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred eleven thousand, four hundred thirty-six".