21020210020063 has 2 divisors, whose sum is σ = 21020210020064. Its totient is φ = 21020210020062.

The previous prime is 21020210020057. The next prime is 21020210020067. The reversal of 21020210020063 is 36002001202012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020210020063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21020210020063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020210020067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510105010031 + 10510105010032.

It is an arithmetic number, because the mean of its divisors is an integer number (10510105010032).

Almost surely, 2^{21020210020063} is an apocalyptic number.

21020210020063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020210020063 is an equidigital number, since it uses as much as digits as its factorization.

21020210020063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21020210020063 its reverse (36002001202012), we get a palindrome (57022211222075).

The spelling of 21020210020063 in words is "twenty-one trillion, twenty billion, two hundred ten million, twenty thousand, sixty-three".