210000021013 has 2 divisors, whose sum is σ = 210000021014. Its totient is φ = 210000021012.

The previous prime is 210000020983. The next prime is 210000021019. The reversal of 210000021013 is 310120000012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169301800369 + 40698220644 = 411463^2 + 201738^2 .

It is a cyclic number.

It is not a de Polignac number, because 210000021013 - 2²⁵ = 209966466581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210000021019) 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, 105000010506 + 105000010507.

It is an arithmetic number, because the mean of its divisors is an integer number (105000010507).

Almost surely, 2^210000021013 is an apocalyptic number.

It is an amenable number.

210000021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

210000021013 is an equidigital number, since it uses as much as digits as its factorization.

210000021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 210000021013 its reverse (310120000012), we get a palindrome (520120021025).

The spelling of 210000021013 in words is "two hundred ten billion, twenty-one thousand, thirteen".