21041305352503 has 2 divisors, whose sum is σ = 21041305352504. Its totient is φ = 21041305352502.

The previous prime is 21041305352497. The next prime is 21041305352521. The reversal of 21041305352503 is 30525350314012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21041305352503 - 2³³ = 21032715417911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21041305352533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520652676251 + 10520652676252.

It is an arithmetic number, because the mean of its divisors is an integer number (10520652676252).

Almost surely, 2^{21041305352503} is an apocalyptic number.

21041305352503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21041305352503 is an equidigital number, since it uses as much as digits as its factorization.

21041305352503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 21041305352503 its reverse (30525350314012), we get a palindrome (51566655666515).

The spelling of 21041305352503 in words is "twenty-one trillion, forty-one billion, three hundred five million, three hundred fifty-two thousand, five hundred three".