123663000121 has 2 divisors, whose sum is σ = 123663000122. Its totient is φ = 123663000120.

The previous prime is 123663000103. The next prime is 123663000143. The reversal of 123663000121 is 121000366321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80994314025 + 42668686096 = 284595^2 + 206564^2 .

It is an emirp because it is prime and its reverse (121000366321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123663000121 - 2⁹ = 123662999609 is a prime.

It is not a weakly prime, because it can be changed into another prime (123663000191) 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 as a sum of consecutive naturals, namely, 61831500060 + 61831500061.

It is an arithmetic number, because the mean of its divisors is an integer number (61831500061).

Almost surely, 2^123663000121 is an apocalyptic number.

It is an amenable number.

123663000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123663000121 is an equidigital number, since it uses as much as digits as its factorization.

123663000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 123663000121 its reverse (121000366321), we get a palindrome (244663366442).

The spelling of 123663000121 in words is "one hundred twenty-three billion, six hundred sixty-three million, one hundred twenty-one", and thus it is an aban number.