12123361 has 2 divisors, whose sum is σ = 12123362. Its totient is φ = 12123360.

The previous prime is 12123359. The next prime is 12123367. The reversal of 12123361 is 16332121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11390625 + 732736 = 3375^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12123361 - 2¹ = 12123359 is a prime.

Together with 12123359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12123367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061680 + 6061681.

It is an arithmetic number, because the mean of its divisors is an integer number (6061681).

Almost surely, 2^12123361 is an apocalyptic number.

It is an amenable number.

12123361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123361 is an equidigital number, since it uses as much as digits as its factorization.

12123361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 12123361 is about 3481.8617146578. The cubic root of 12123361 is about 229.7246926459.

Adding to 12123361 its reverse (16332121), we get a palindrome (28455482).

The spelling of 12123361 in words is "twelve million, one hundred twenty-three thousand, three hundred sixty-one".