21050033395499 has 2 divisors, whose sum is σ = 21050033395500. Its totient is φ = 21050033395498.

The previous prime is 21050033395471. The next prime is 21050033395577. The reversal of 21050033395499 is 99459333005012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21050033395499 - 2⁸ = 21050033395243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21050033395499.

It is not a weakly prime, because it can be changed into another prime (21050033395409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525016697749 + 10525016697750.

It is an arithmetic number, because the mean of its divisors is an integer number (10525016697750).

Almost surely, 2^{21050033395499} is an apocalyptic number.

21050033395499 is a deficient number, since it is larger than the sum of its proper divisors (1).

21050033395499 is an equidigital number, since it uses as much as digits as its factorization.

21050033395499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3936600, while the sum is 53.

The spelling of 21050033395499 in words is "twenty-one trillion, fifty billion, thirty-three million, three hundred ninety-five thousand, four hundred ninety-nine".