213123313223 has 4 divisors (see below), whose sum is σ = 215320460880. Its totient is φ = 210926165568.

The previous prime is 213123313219. The next prime is 213123313237. The reversal of 213123313223 is 322313321312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213123313223 - 2² = 213123313219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213123313192 and 213123313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123313523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098573683 + ... + 1098573876.

It is an arithmetic number, because the mean of its divisors is an integer number (53830115220).

Almost surely, 2^213123313223 is an apocalyptic number.

213123313223 is a deficient number, since it is larger than the sum of its proper divisors (2197147657).

213123313223 is an equidigital number, since it uses as much as digits as its factorization.

213123313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197147656.

The product of its digits is 3888, while the sum is 26.

Adding to 213123313223 its reverse (322313321312), we get a palindrome (535436634535).

The spelling of 213123313223 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred thirteen thousand, two hundred twenty-three".