12312331231121 has 4 divisors (see below), whose sum is σ = 12312338785572. Its totient is φ = 12312323676672.

The previous prime is 12312331231097. The next prime is 12312331231133. The reversal of 12312331231121 is 12113213321321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10039138771600 + 2273192459521 = 3168460^2 + 1507711^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312331231121 - 2¹⁴ = 12312331214737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312331231181) 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 3 ways as a sum of consecutive naturals, for example, 208760 + ... + 4966713.

It is an arithmetic number, because the mean of its divisors is an integer number (3078084696393).

Almost surely, 2^{12312331231121} is an apocalyptic number.

It is an amenable number.

12312331231121 is a deficient number, since it is larger than the sum of its proper divisors (7554451).

12312331231121 is an equidigital number, since it uses as much as digits as its factorization.

12312331231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554450.

The product of its digits is 1296, while the sum is 26.

Adding to 12312331231121 its reverse (12113213321321), we get a palindrome (24425544552442).

The spelling of 12312331231121 in words is "twelve trillion, three hundred twelve billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-one".