21000210110263 has 2 divisors, whose sum is σ = 21000210110264. Its totient is φ = 21000210110262.

The previous prime is 21000210110221. The next prime is 21000210110401. The reversal of 21000210110263 is 36201101200012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000210110263 - 2²⁹ = 20999673239351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21000210110263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000210210263) 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, 10500105055131 + 10500105055132.

It is an arithmetic number, because the mean of its divisors is an integer number (10500105055132).

Almost surely, 2^{21000210110263} is an apocalyptic number.

21000210110263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000210110263 is an equidigital number, since it uses as much as digits as its factorization.

21000210110263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21000210110263 its reverse (36201101200012), we get a palindrome (57201311310275).

The spelling of 21000210110263 in words is "twenty-one trillion, two hundred ten million, one hundred ten thousand, two hundred sixty-three".