21011210063 has 2 divisors, whose sum is σ = 21011210064. Its totient is φ = 21011210062.

The previous prime is 21011210057. The next prime is 21011210111. The reversal of 21011210063 is 36001211012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011210063 - 2²² = 21007015759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011210023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505605031 + 10505605032.

It is an arithmetic number, because the mean of its divisors is an integer number (10505605032).

Almost surely, 2^21011210063 is an apocalyptic number.

21011210063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011210063 is an equidigital number, since it uses as much as digits as its factorization.

21011210063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21011210063 its reverse (36001211012), we get a palindrome (57012421075).

The spelling of 21011210063 in words is "twenty-one billion, eleven million, two hundred ten thousand, sixty-three".