210123202013 has 2 divisors, whose sum is σ = 210123202014. Its totient is φ = 210123202012.

The previous prime is 210123202007. The next prime is 210123202033. The reversal of 210123202013 is 310202321012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209743848484 + 379353529 = 457978^2 + 19477^2 .

It is a cyclic number.

It is not a de Polignac number, because 210123202013 - 2¹⁸ = 210122939869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210123201982 and 210123202000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210123202033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061601006 + 105061601007.

It is an arithmetic number, because the mean of its divisors is an integer number (105061601007).

Almost surely, 2^210123202013 is an apocalyptic number.

It is an amenable number.

210123202013 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123202013 is an equidigital number, since it uses as much as digits as its factorization.

210123202013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210123202013 its reverse (310202321012), we get a palindrome (520325523025).

The spelling of 210123202013 in words is "two hundred ten billion, one hundred twenty-three million, two hundred two thousand, thirteen".