12213123 has 32 divisors (see below), whose sum is σ = 18849600. Its totient is φ = 7008768.

The previous prime is 12213109. The next prime is 12213127. The reversal of 12213123 is 32131221.

It is not a de Polignac number, because 12213123 - 2⁸ = 12212867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12213127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111993 + ... + 112101.

It is an arithmetic number, because the mean of its divisors is an integer number (589050).

Almost surely, 2^12213123 is an apocalyptic number.

12213123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12213123 is a deficient number, since it is larger than the sum of its proper divisors (6636477).

12213123 is a wasteful number, since it uses less digits than its factorization.

12213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 142 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 12213123 is about 3494.7278864026. The cubic root of 12213123 is about 230.2902636483.

Adding to 12213123 its reverse (32131221), we get a palindrome (44344344).

It can be divided in two parts, 1221 and 3123, that multiplied together give a palindrome (3813183).

The spelling of 12213123 in words is "twelve million, two hundred thirteen thousand, one hundred twenty-three".