243121043142 has 24 divisors (see below), whose sum is σ = 526791741840. Its totient is φ = 81035812080.

The previous prime is 243121043101. The next prime is 243121043147. The reversal of 243121043142 is 241340121342.

243121043142 is a `hidden beast` number, since 2 + 431 + 210 + 4 + 3 + 14 + 2 = 666.

243121043142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121043147) 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 11 ways as a sum of consecutive naturals, for example, 39217 + ... + 698412.

It is an arithmetic number, because the mean of its divisors is an integer number (21949655910).

Almost surely, 2^243121043142 is an apocalyptic number.

243121043142 is an abundant number, since it is smaller than the sum of its proper divisors (283670698698).

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

243121043142 is a wasteful number, since it uses less digits than its factorization.

243121043142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755948 (or 755945 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 243121043142 its reverse (241340121342), we get a palindrome (484461164484).

The spelling of 243121043142 in words is "two hundred forty-three billion, one hundred twenty-one million, forty-three thousand, one hundred forty-two".