213313123 has 2 divisors, whose sum is σ = 213313124. Its totient is φ = 213313122.

The previous prime is 213313099. The next prime is 213313141. The reversal of 213313123 is 321313312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213313123 - 2⁵ = 213313091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213313123.

It is not a weakly prime, because it can be changed into another prime (213313223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106656561 + 106656562.

It is an arithmetic number, because the mean of its divisors is an integer number (106656562).

Almost surely, 2^213313123 is an apocalyptic number.

213313123 is a deficient number, since it is larger than the sum of its proper divisors (1).

213313123 is an equidigital number, since it uses as much as digits as its factorization.

213313123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 213313123 is about 14605.2429969515. The cubic root of 213313123 is about 597.5017633860.

Adding to 213313123 its reverse (321313312), we get a palindrome (534626435).

The spelling of 213313123 in words is "two hundred thirteen million, three hundred thirteen thousand, one hundred twenty-three".