12043634021 has 2 divisors, whose sum is σ = 12043634022. Its totient is φ = 12043634020.

The previous prime is 12043634017. The next prime is 12043634033.

12043634021 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9364432900 + 2679201121 = 96770^2 + 51761^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12043634021 - 2² = 12043634017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12043634041) 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, 6021817010 + 6021817011.

It is an arithmetic number, because the mean of its divisors is an integer number (6021817011).

Almost surely, 2^12043634021 is an apocalyptic number.

It is an amenable number.

12043634021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12043634021 is an equidigital number, since it uses as much as digits as its factorization.

12043634021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 12043634021 in words is "twelve billion, forty-three million, six hundred thirty-four thousand, twenty-one".