21043112063 has 2 divisors, whose sum is σ = 21043112064. Its totient is φ = 21043112062.

The previous prime is 21043112039. The next prime is 21043112087. The reversal of 21043112063 is 36021134012.

It is a balanced prime because it is at equal distance from previous prime (21043112039) and next prime (21043112087).

It is a cyclic number.

It is not a de Polignac number, because 21043112063 - 2²⁰ = 21042063487 is a prime.

It is a super-2 number, since 2×21043112063² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21043412063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10521556031 + 10521556032.

It is an arithmetic number, because the mean of its divisors is an integer number (10521556032).

Almost surely, 2^21043112063 is an apocalyptic number.

21043112063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21043112063 is an equidigital number, since it uses as much as digits as its factorization.

21043112063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21043112063 its reverse (36021134012), we get a palindrome (57064246075).

The spelling of 21043112063 in words is "twenty-one billion, forty-three million, one hundred twelve thousand, sixty-three".