21301230113 has 2 divisors, whose sum is σ = 21301230114. Its totient is φ = 21301230112.

The previous prime is 21301230109. The next prime is 21301230173. The reversal of 21301230113 is 31103210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16856607889 + 4444622224 = 129833^2 + 66668^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301230113 - 2² = 21301230109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301230091 and 21301230100.

It is not a weakly prime, because it can be changed into another prime (21301230173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650615056 + 10650615057.

It is an arithmetic number, because the mean of its divisors is an integer number (10650615057).

Almost surely, 2^21301230113 is an apocalyptic number.

It is an amenable number.

21301230113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301230113 is an equidigital number, since it uses as much as digits as its factorization.

21301230113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21301230113 its reverse (31103210312), we get a palindrome (52404440425).

The spelling of 21301230113 in words is "twenty-one billion, three hundred one million, two hundred thirty thousand, one hundred thirteen".