21210003675005 has 64 divisors (see below), whose sum is σ = 28045935590400. Its totient is φ = 15341265838080.

The previous prime is 21210003674999. The next prime is 21210003675023. The reversal of 21210003675005 is 50057630001212.

It is not a de Polignac number, because 21210003675005 - 2⁸ = 21210003674749 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69416156 + ... + 69721034.

It is an arithmetic number, because the mean of its divisors is an integer number (438217743600).

Almost surely, 2^{21210003675005} is an apocalyptic number.

It is an amenable number.

21210003675005 is a deficient number, since it is larger than the sum of its proper divisors (6835931915395).

21210003675005 is a wasteful number, since it uses less digits than its factorization.

21210003675005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305334.

The product of its (nonzero) digits is 12600, while the sum is 32.

Adding to 21210003675005 its reverse (50057630001212), we get a palindrome (71267633676217).

The spelling of 21210003675005 in words is "twenty-one trillion, two hundred ten billion, three million, six hundred seventy-five thousand, five".