18241446121 has 2 divisors, whose sum is σ = 18241446122. Its totient is φ = 18241446120.

The previous prime is 18241446089. The next prime is 18241446163. The reversal of 18241446121 is 12164414281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10335568896 + 7905877225 = 101664^2 + 88915^2 .

It is a cyclic number.

It is not a de Polignac number, because 18241446121 - 2⁵ = 18241446089 is a prime.

It is not a weakly prime, because it can be changed into another prime (18241446191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9120723060 + 9120723061.

It is an arithmetic number, because the mean of its divisors is an integer number (9120723061).

Almost surely, 2^18241446121 is an apocalyptic number.

It is an amenable number.

18241446121 is a deficient number, since it is larger than the sum of its proper divisors (1).

18241446121 is an equidigital number, since it uses as much as digits as its factorization.

18241446121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 34.

The spelling of 18241446121 in words is "eighteen billion, two hundred forty-one million, four hundred forty-six thousand, one hundred twenty-one".