21201200120063 has 2 divisors, whose sum is σ = 21201200120064. Its totient is φ = 21201200120062.

The previous prime is 21201200120047. The next prime is 21201200120117. The reversal of 21201200120063 is 36002100210212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201200120063 - 2⁴ = 21201200120047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201200120033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600600060031 + 10600600060032.

It is an arithmetic number, because the mean of its divisors is an integer number (10600600060032).

Almost surely, 2^{21201200120063} is an apocalyptic number.

21201200120063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201200120063 is an equidigital number, since it uses as much as digits as its factorization.

21201200120063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21201200120063 its reverse (36002100210212), we get a palindrome (57203300330275).

The spelling of 21201200120063 in words is "twenty-one trillion, two hundred one billion, two hundred million, one hundred twenty thousand, sixty-three".