21010111163 has 2 divisors, whose sum is σ = 21010111164. Its totient is φ = 21010111162.

The previous prime is 21010111103. The next prime is 21010111201. The reversal of 21010111163 is 36111101012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010111163 - 2¹⁸ = 21009849019 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010111103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505055581 + 10505055582.

It is an arithmetic number, because the mean of its divisors is an integer number (10505055582).

Almost surely, 2^21010111163 is an apocalyptic number.

21010111163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010111163 is an equidigital number, since it uses as much as digits as its factorization.

21010111163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21010111163 its reverse (36111101012), we get a palindrome (57121212175).

The spelling of 21010111163 in words is "twenty-one billion, ten million, one hundred eleven thousand, one hundred sixty-three".