843425231121 has 64 divisors (see below), whose sum is σ = 1368674979840. Its totient is φ = 509084896320.

The previous prime is 843425231119. The next prime is 843425231149. The reversal of 843425231121 is 121132524348.

843425231121 is a `hidden beast` number, since 8 + 4 + 3 + 4 + 2 + 523 + 1 + 121 = 666.

It is not a de Polignac number, because 843425231121 - 2¹ = 843425231119 is a prime.

It is a super-2 number, since 2×843425231121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (843425231191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75212911 + ... + 75224123.

It is an arithmetic number, because the mean of its divisors is an integer number (21385546560).

Almost surely, 2^843425231121 is an apocalyptic number.

It is an amenable number.

843425231121 is a deficient number, since it is larger than the sum of its proper divisors (525249748719).

843425231121 is a wasteful number, since it uses less digits than its factorization.

843425231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243 (or 12237 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

Adding to 843425231121 its reverse (121132524348), we get a palindrome (964557755469).

The spelling of 843425231121 in words is "eight hundred forty-three billion, four hundred twenty-five million, two hundred thirty-one thousand, one hundred twenty-one".