12331120121 has 2 divisors, whose sum is σ = 12331120122. Its totient is φ = 12331120120.

The previous prime is 12331120103. The next prime is 12331120127. The reversal of 12331120121 is 12102113321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10470405625 + 1860714496 = 102325^2 + 43136^2 .

It is an emirp because it is prime and its reverse (12102113321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12331120121 - 2¹⁴ = 12331103737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12331120121.

It is not a weakly prime, because it can be changed into another prime (12331120127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165560060 + 6165560061.

It is an arithmetic number, because the mean of its divisors is an integer number (6165560061).

Almost surely, 2^12331120121 is an apocalyptic number.

It is an amenable number.

12331120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331120121 is an equidigital number, since it uses as much as digits as its factorization.

12331120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12331120121 its reverse (12102113321), we get a palindrome (24433233442).

The spelling of 12331120121 in words is "twelve billion, three hundred thirty-one million, one hundred twenty thousand, one hundred twenty-one".