21120100020163 has 2 divisors, whose sum is σ = 21120100020164. Its totient is φ = 21120100020162.

The previous prime is 21120100020143. The next prime is 21120100020169. The reversal of 21120100020163 is 36102000102112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120100020163 - 2³⁷ = 20982661066691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21120100020163.

It is not a weakly prime, because it can be changed into another prime (21120100020169) 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, 10560050010081 + 10560050010082.

It is an arithmetic number, because the mean of its divisors is an integer number (10560050010082).

Almost surely, 2^{21120100020163} is an apocalyptic number.

21120100020163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120100020163 is an equidigital number, since it uses as much as digits as its factorization.

21120100020163 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 21120100020163 its reverse (36102000102112), we get a palindrome (57222100122275).

The spelling of 21120100020163 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, twenty thousand, one hundred sixty-three".