21101230063 has 2 divisors, whose sum is σ = 21101230064. Its totient is φ = 21101230062.

The previous prime is 21101230019. The next prime is 21101230069. The reversal of 21101230063 is 36003210112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101230063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101230063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101230069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550615031 + 10550615032.

It is an arithmetic number, because the mean of its divisors is an integer number (10550615032).

Almost surely, 2^21101230063 is an apocalyptic number.

21101230063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101230063 is an equidigital number, since it uses as much as digits as its factorization.

21101230063 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 21101230063 its reverse (36003210112), we get a palindrome (57104440175).

The spelling of 21101230063 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, sixty-three".