21344133017 has 2 divisors, whose sum is σ = 21344133018. Its totient is φ = 21344133016.

The previous prime is 21344133011. The next prime is 21344133061. The reversal of 21344133017 is 71033144312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18618875401 + 2725257616 = 136451^2 + 52204^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344133017 - 2⁴ = 21344133001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21344133011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672066508 + 10672066509.

It is an arithmetic number, because the mean of its divisors is an integer number (10672066509).

Almost surely, 2^21344133017 is an apocalyptic number.

It is an amenable number.

21344133017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344133017 is an equidigital number, since it uses as much as digits as its factorization.

21344133017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 21344133017 its reverse (71033144312), we get a palindrome (92377277329).

The spelling of 21344133017 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-three thousand, seventeen".