21375241114517 has 2 divisors, whose sum is σ = 21375241114518. Its totient is φ = 21375241114516.

The previous prime is 21375241114501. The next prime is 21375241114531. The reversal of 21375241114517 is 71541114257312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21322359052996 + 52882061521 = 4617614^2 + 229961^2 .

It is a cyclic number.

It is not a de Polignac number, because 21375241114517 - 2⁴ = 21375241114501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21375241314517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687620557258 + 10687620557259.

It is an arithmetic number, because the mean of its divisors is an integer number (10687620557259).

Almost surely, 2^{21375241114517} is an apocalyptic number.

It is an amenable number.

21375241114517 is a deficient number, since it is larger than the sum of its proper divisors (1).

21375241114517 is an equidigital number, since it uses as much as digits as its factorization.

21375241114517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 44.

The spelling of 21375241114517 in words is "twenty-one trillion, three hundred seventy-five billion, two hundred forty-one million, one hundred fourteen thousand, five hundred seventeen".