123213311 has 4 divisors (see below), whose sum is σ = 132691272. Its totient is φ = 113735352.

The previous prime is 123213289. The next prime is 123213401. The reversal of 123213311 is 113312321.

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 123213311 - 2⁶ = 123213247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123213311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123213011) 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, 4738961 + ... + 4738986.

It is an arithmetic number, because the mean of its divisors is an integer number (33172818).

Almost surely, 2^123213311 is an apocalyptic number.

123213311 is a deficient number, since it is larger than the sum of its proper divisors (9477961).

123213311 is an equidigital number, since it uses as much as digits as its factorization.

123213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477960.

The product of its digits is 108, while the sum is 17.

The square root of 123213311 is about 11100.1491431422. The cubic root of 123213311 is about 497.6063067523.

Adding to 123213311 its reverse (113312321), we get a palindrome (236525632).

The spelling of 123213311 in words is "one hundred twenty-three million, two hundred thirteen thousand, three hundred eleven".