21101301163 has 2 divisors, whose sum is σ = 21101301164. Its totient is φ = 21101301162.

The previous prime is 21101301161. The next prime is 21101301197. The reversal of 21101301163 is 36110310112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101301163 - 2¹ = 21101301161 is a prime.

Together with 21101301161, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21101301163.

It is not a weakly prime, because it can be changed into another prime (21101301161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550650581 + 10550650582.

It is an arithmetic number, because the mean of its divisors is an integer number (10550650582).

Almost surely, 2^21101301163 is an apocalyptic number.

21101301163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101301163 is an equidigital number, since it uses as much as digits as its factorization.

21101301163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21101301163 its reverse (36110310112), we get a palindrome (57211611275).

The spelling of 21101301163 in words is "twenty-one billion, one hundred one million, three hundred one thousand, one hundred sixty-three".