21100210300063 has 2 divisors, whose sum is σ = 21100210300064. Its totient is φ = 21100210300062.

The previous prime is 21100210300019. The next prime is 21100210300121. The reversal of 21100210300063 is 36000301200112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100210300063 - 2²¹ = 21100208202911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100210300063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100210300163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550105150031 + 10550105150032.

It is an arithmetic number, because the mean of its divisors is an integer number (10550105150032).

Almost surely, 2^{21100210300063} is an apocalyptic number.

21100210300063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100210300063 is an equidigital number, since it uses as much as digits as its factorization.

21100210300063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21100210300063 its reverse (36000301200112), we get a palindrome (57100511500175).

The spelling of 21100210300063 in words is "twenty-one trillion, one hundred billion, two hundred ten million, three hundred thousand, sixty-three".