123133213 has 4 divisors (see below), whose sum is σ = 140723680. Its totient is φ = 105542748.

The previous prime is 123133211. The next prime is 123133249. The reversal of 123133213 is 312331321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123133213 - 2¹ = 123133211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8795223 + ... + 8795236.

It is an arithmetic number, because the mean of its divisors is an integer number (35180920).

Almost surely, 2^123133213 is an apocalyptic number.

It is an amenable number.

123133213 is a deficient number, since it is larger than the sum of its proper divisors (17590467).

123133213 is an equidigital number, since it uses as much as digits as its factorization.

123133213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17590466.

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

The square root of 123133213 is about 11096.5405870478. The cubic root of 123133213 is about 497.4984560948.

Adding to 123133213 its reverse (312331321), we get a palindrome (435464534).

The spelling of 123133213 in words is "one hundred twenty-three million, one hundred thirty-three thousand, two hundred thirteen".