243242435121 has 12 divisors (see below), whose sum is σ = 377273981232. Its totient is φ = 138995677128.

The previous prime is 243242435101. The next prime is 243242435123. The reversal of 243242435121 is 121534242342.

It is a happy number.

It is not a de Polignac number, because 243242435121 - 2¹⁴ = 243242418737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243242435123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827355075 + ... + 827355368.

It is an arithmetic number, because the mean of its divisors is an integer number (31439498436).

Almost surely, 2^243242435121 is an apocalyptic number.

243242435121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243242435121 is a deficient number, since it is larger than the sum of its proper divisors (134031546111).

243242435121 is a wasteful number, since it uses less digits than its factorization.

243242435121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654710460 (or 1654710453 counting only the distinct ones).

The product of its digits is 46080, while the sum is 33.

Adding to 243242435121 its reverse (121534242342), we get a palindrome (364776677463).

The spelling of 243242435121 in words is "two hundred forty-three billion, two hundred forty-two million, four hundred thirty-five thousand, one hundred twenty-one".