4012120112321 has 2 divisors, whose sum is σ = 4012120112322. Its totient is φ = 4012120112320.

The previous prime is 4012120112317. The next prime is 4012120112333. The reversal of 4012120112321 is 1232110212104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2337645292096 + 1674474820225 = 1528936^2 + 1294015^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012120112321 - 2² = 4012120112317 is a prime.

It is a super-3 number, since 3×4012120112321³ (a number of 39 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4012120112293 and 4012120112302.

It is not a weakly prime, because it can be changed into another prime (4012120115321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006060056160 + 2006060056161.

It is an arithmetic number, because the mean of its divisors is an integer number (2006060056161).

Almost surely, 2^{4012120112321} is an apocalyptic number.

It is an amenable number.

4012120112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012120112321 is an equidigital number, since it uses as much as digits as its factorization.

4012120112321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 4012120112321 its reverse (1232110212104), we get a palindrome (5244230324425).

The spelling of 4012120112321 in words is "four trillion, twelve billion, one hundred twenty million, one hundred twelve thousand, three hundred twenty-one".