243121244142 has 16 divisors (see below), whose sum is σ = 555705700992. Its totient is φ = 69463212600.

The previous prime is 243121244141. The next prime is 243121244143. The reversal of 243121244142 is 241442121342.

It is an interprime number because it is at equal distance from previous prime (243121244141) and next prime (243121244143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121244141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2894300484 + ... + 2894300567.

It is an arithmetic number, because the mean of its divisors is an integer number (34731606312).

Almost surely, 2^243121244142 is an apocalyptic number.

243121244142 is an abundant number, since it is smaller than the sum of its proper divisors (312584456850).

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

243121244142 is a wasteful number, since it uses less digits than its factorization.

243121244142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788601063.

The product of its digits is 12288, while the sum is 30.

Adding to 243121244142 its reverse (241442121342), we get a palindrome (484563365484).

The spelling of 243121244142 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, one hundred forty-two".