213123313303 has 2 divisors, whose sum is σ = 213123313304. Its totient is φ = 213123313302.

The previous prime is 213123313237. The next prime is 213123313309. The reversal of 213123313303 is 303313321312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213123313303 - 2⁹ = 213123312791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213123313309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561656651 + 106561656652.

It is an arithmetic number, because the mean of its divisors is an integer number (106561656652).

Almost surely, 2^213123313303 is an apocalyptic number.

213123313303 is a deficient number, since it is larger than the sum of its proper divisors (1).

213123313303 is an equidigital number, since it uses as much as digits as its factorization.

213123313303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 213123313303 its reverse (303313321312), we get a palindrome (516436634615).

The spelling of 213123313303 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred thirteen thousand, three hundred three".