21010502241403 has 2 divisors, whose sum is σ = 21010502241404. Its totient is φ = 21010502241402.

The previous prime is 21010502241361. The next prime is 21010502241473. The reversal of 21010502241403 is 30414220501012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010502241403 - 2²¹ = 21010500144251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010502241473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505251120701 + 10505251120702.

It is an arithmetic number, because the mean of its divisors is an integer number (10505251120702).

Almost surely, 2^{21010502241403} is an apocalyptic number.

21010502241403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010502241403 is an equidigital number, since it uses as much as digits as its factorization.

21010502241403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21010502241403 its reverse (30414220501012), we get a palindrome (51424722742415).

The spelling of 21010502241403 in words is "twenty-one trillion, ten billion, five hundred two million, two hundred forty-one thousand, four hundred three".