21030112013 has 2 divisors, whose sum is σ = 21030112014. Its totient is φ = 21030112012.

The previous prime is 21030112007. The next prime is 21030112027. The reversal of 21030112013 is 31021103012.

It is an a-pointer prime, because the next prime (21030112027) can be obtained adding 21030112013 to its sum of digits (14).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20210034244 + 820077769 = 142162^2 + 28637^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030112013 - 2⁴ = 21030111997 is a prime.

It is a super-2 number, since 2×21030112013² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030112003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515056006 + 10515056007.

It is an arithmetic number, because the mean of its divisors is an integer number (10515056007).

Almost surely, 2^21030112013 is an apocalyptic number.

It is an amenable number.

21030112013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030112013 is an equidigital number, since it uses as much as digits as its factorization.

21030112013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21030112013 its reverse (31021103012), we get a palindrome (52051215025).

Subtracting 21030112013 from its reverse (31021103012), we obtain a palindrome (9990990999).

The spelling of 21030112013 in words is "twenty-one billion, thirty million, one hundred twelve thousand, thirteen".