21010502241473 has 2 divisors, whose sum is σ = 21010502241474. Its totient is φ = 21010502241472.

The previous prime is 21010502241403. The next prime is 21010502241517. The reversal of 21010502241473 is 37414220501012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20987283491344 + 23218750129 = 4581188^2 + 152377^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010502241473 - 2³⁰ = 21009428499649 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010502241403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505251120736 + 10505251120737.

It is an arithmetic number, because the mean of its divisors is an integer number (10505251120737).

Almost surely, 2^{21010502241473} is an apocalyptic number.

It is an amenable number.

21010502241473 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010502241473 is an equidigital number, since it uses as much as digits as its factorization.

21010502241473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 21010502241473 its reverse (37414220501012), we get a palindrome (58424722742485).

The spelling of 21010502241473 in words is "twenty-one trillion, ten billion, five hundred two million, two hundred forty-one thousand, four hundred seventy-three".