12310312121 has 2 divisors, whose sum is σ = 12310312122. Its totient is φ = 12310312120.

The previous prime is 12310312073. The next prime is 12310312139. The reversal of 12310312121 is 12121301321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12213565225 + 96746896 = 110515^2 + 9836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12310312121 - 2³⁰ = 11236570297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12310312121.

It is not a weakly prime, because it can be changed into another prime (12310311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155156060 + 6155156061.

It is an arithmetic number, because the mean of its divisors is an integer number (6155156061).

Almost surely, 2^12310312121 is an apocalyptic number.

It is an amenable number.

12310312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12310312121 is an equidigital number, since it uses as much as digits as its factorization.

12310312121 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 12310312121 its reverse (12121301321), we get a palindrome (24431613442).

The spelling of 12310312121 in words is "twelve billion, three hundred ten million, three hundred twelve thousand, one hundred twenty-one".