21002222020063 has 2 divisors, whose sum is σ = 21002222020064. Its totient is φ = 21002222020062.

The previous prime is 21002222020037. The next prime is 21002222020127. The reversal of 21002222020063 is 36002022220012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002222020063 - 2⁹ = 21002222019551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002222020363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501111010031 + 10501111010032.

It is an arithmetic number, because the mean of its divisors is an integer number (10501111010032).

Almost surely, 2^{21002222020063} is an apocalyptic number.

21002222020063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002222020063 is an equidigital number, since it uses as much as digits as its factorization.

21002222020063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21002222020063 its reverse (36002022220012), we get a palindrome (57004244240075).

The spelling of 21002222020063 in words is "twenty-one trillion, two billion, two hundred twenty-two million, twenty thousand, sixty-three".