21210123000163 has 2 divisors, whose sum is σ = 21210123000164. Its totient is φ = 21210123000162.

The previous prime is 21210123000161. The next prime is 21210123000223. The reversal of 21210123000163 is 36100032101212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21210123000163 - 2¹ = 21210123000161 is a prime.

Together with 21210123000161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21210123000161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605061500081 + 10605061500082.

It is an arithmetic number, because the mean of its divisors is an integer number (10605061500082).

Almost surely, 2^{21210123000163} is an apocalyptic number.

21210123000163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210123000163 is an equidigital number, since it uses as much as digits as its factorization.

21210123000163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21210123000163 its reverse (36100032101212), we get a palindrome (57310155101375).

The spelling of 21210123000163 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-three million, one hundred sixty-three", and thus it is an aban number.