400030123000121 has 2 divisors, whose sum is σ = 400030123000122. Its totient is φ = 400030123000120.

The previous prime is 400030123000073. The next prime is 400030123000141. The reversal of 400030123000121 is 121000321030004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219021648384400 + 181008474615721 = 14799380^2 + 13453939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400030123000121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400030123000121.

It is not a weakly prime, because it can be changed into another prime (400030123000141) 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, 200015061500060 + 200015061500061.

It is an arithmetic number, because the mean of its divisors is an integer number (200015061500061).

Almost surely, 2^{400030123000121} is an apocalyptic number.

It is an amenable number.

400030123000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

400030123000121 is an equidigital number, since it uses as much as digits as its factorization.

400030123000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 400030123000121 its reverse (121000321030004), we get a palindrome (521030444030125).

The spelling of 400030123000121 in words is "four hundred trillion, thirty billion, one hundred twenty-three million, one hundred twenty-one", and thus it is an aban number.