21211010020163 has 2 divisors, whose sum is σ = 21211010020164. Its totient is φ = 21211010020162.

The previous prime is 21211010020159. The next prime is 21211010020181. The reversal of 21211010020163 is 36102001011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211010020163 - 2² = 21211010020159 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211010020133) 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, 10605505010081 + 10605505010082.

It is an arithmetic number, because the mean of its divisors is an integer number (10605505010082).

Almost surely, 2^{21211010020163} is an apocalyptic number.

21211010020163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211010020163 is an equidigital number, since it uses as much as digits as its factorization.

21211010020163 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 20.

Adding to 21211010020163 its reverse (36102001011212), we get a palindrome (57313011031375).

The spelling of 21211010020163 in words is "twenty-one trillion, two hundred eleven billion, ten million, twenty thousand, one hundred sixty-three".