12123321424 has 10 divisors (see below), whose sum is σ = 23488935290. Its totient is φ = 6061660704.

The previous prime is 12123321409. The next prime is 12123321433. The reversal of 12123321424 is 42412332121.

It can be written as a sum of positive squares in only one way, i.e., 6933559824 + 5189761600 = 83268^2 + 72040^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378853779 + ... + 378853810.

It is an arithmetic number, because the mean of its divisors is an integer number (2348893529).

Almost surely, 2^12123321424 is an apocalyptic number.

It is an amenable number.

12123321424 is a deficient number, since it is larger than the sum of its proper divisors (11365613866).

12123321424 is an equidigital number, since it uses as much as digits as its factorization.

12123321424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757707597 (or 757707591 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 12123321424 its reverse (42412332121), we get a palindrome (54535653545).

The spelling of 12123321424 in words is "twelve billion, one hundred twenty-three million, three hundred twenty-one thousand, four hundred twenty-four".