21210200000893 has 2 divisors, whose sum is σ = 21210200000894. Its totient is φ = 21210200000892.

The previous prime is 21210200000887. The next prime is 21210200000923. The reversal of 21210200000893 is 39800000201212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20533024070244 + 677175930649 = 4531338^2 + 822907^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210200000893 - 2¹⁷ = 21210199869821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210200000293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605100000446 + 10605100000447.

It is an arithmetic number, because the mean of its divisors is an integer number (10605100000447).

Almost surely, 2^{21210200000893} is an apocalyptic number.

It is an amenable number.

21210200000893 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210200000893 is an equidigital number, since it uses as much as digits as its factorization.

21210200000893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 21210200000893 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eight hundred ninety-three", and thus it is an aban number.