21310016027 has 2 divisors, whose sum is σ = 21310016028. Its totient is φ = 21310016026.

The previous prime is 21310016009. The next prime is 21310016083. The reversal of 21310016027 is 72061001312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21310016027 - 2⁶ = 21310015963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21310015993 and 21310016011.

It is not a weakly prime, because it can be changed into another prime (21310010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655008013 + 10655008014.

It is an arithmetic number, because the mean of its divisors is an integer number (10655008014).

Almost surely, 2^21310016027 is an apocalyptic number.

21310016027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310016027 is an equidigital number, since it uses as much as digits as its factorization.

21310016027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21310016027 its reverse (72061001312), we get a palindrome (93371017339).

The spelling of 21310016027 in words is "twenty-one billion, three hundred ten million, sixteen thousand, twenty-seven".