21126067241 has 2 divisors, whose sum is σ = 21126067242. Its totient is φ = 21126067240.

The previous prime is 21126067223. The next prime is 21126067289. The reversal of 21126067241 is 14276062112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20626991641 + 499075600 = 143621^2 + 22340^2 .

It is a cyclic number.

It is not a de Polignac number, because 21126067241 - 2¹⁸ = 21125805097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21126067198 and 21126067207.

It is not a weakly prime, because it can be changed into another prime (21126067441) 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, 10563033620 + 10563033621.

It is an arithmetic number, because the mean of its divisors is an integer number (10563033621).

Almost surely, 2^21126067241 is an apocalyptic number.

It is an amenable number.

21126067241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21126067241 is an equidigital number, since it uses as much as digits as its factorization.

21126067241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21126067241 in words is "twenty-one billion, one hundred twenty-six million, sixty-seven thousand, two hundred forty-one".