210003121313 has 2 divisors, whose sum is σ = 210003121314. Its totient is φ = 210003121312.

The previous prime is 210003121301. The next prime is 210003121319. The reversal of 210003121313 is 313121300012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208655276944 + 1347844369 = 456788^2 + 36713^2 .

It is a cyclic number.

It is not a de Polignac number, because 210003121313 - 2⁴ = 210003121297 is a prime.

It is a super-2 number, since 2×210003121313² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210003121291 and 210003121300.

It is not a weakly prime, because it can be changed into another prime (210003121319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105001560656 + 105001560657.

It is an arithmetic number, because the mean of its divisors is an integer number (105001560657).

Almost surely, 2^210003121313 is an apocalyptic number.

It is an amenable number.

210003121313 is a deficient number, since it is larger than the sum of its proper divisors (1).

210003121313 is an equidigital number, since it uses as much as digits as its factorization.

210003121313 is an evil number, because the sum of its binary digits is even.

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

Adding to 210003121313 its reverse (313121300012), we get a palindrome (523124421325).

The spelling of 210003121313 in words is "two hundred ten billion, three million, one hundred twenty-one thousand, three hundred thirteen".