210005821313 has 2 divisors, whose sum is σ = 210005821314. Its totient is φ = 210005821312.

The previous prime is 210005821283. The next prime is 210005821321. The reversal of 210005821313 is 313128500012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196561882609 + 13443938704 = 443353^2 + 115948^2 .

It is a cyclic number.

It is not a de Polignac number, because 210005821313 - 2⁸ = 210005821057 is a prime.

It is not a weakly prime, because it can be changed into another prime (210005821393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105002910656 + 105002910657.

It is an arithmetic number, because the mean of its divisors is an integer number (105002910657).

Almost surely, 2^210005821313 is an apocalyptic number.

It is an amenable number.

210005821313 is a deficient number, since it is larger than the sum of its proper divisors (1).

210005821313 is an equidigital number, since it uses as much as digits as its factorization.

210005821313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 210005821313 in words is "two hundred ten billion, five million, eight hundred twenty-one thousand, three hundred thirteen".