12421272328 has 8 divisors (see below), whose sum is σ = 23289885630. Its totient is φ = 6210636160.

The previous prime is 12421272323. The next prime is 12421272329. The reversal of 12421272328 is 82327212421.

It can be written as a sum of positive squares in only one way, i.e., 7191379204 + 5229893124 = 84802^2 + 72318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12421272293 and 12421272302.

It is not an unprimeable number, because it can be changed into a prime (12421272323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776329513 + ... + 776329528.

Almost surely, 2^12421272328 is an apocalyptic number.

It is an amenable number.

12421272328 is a deficient number, since it is larger than the sum of its proper divisors (10868613302).

12421272328 is a wasteful number, since it uses less digits than its factorization.

12421272328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552659047 (or 1552659043 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

Adding to 12421272328 its reverse (82327212421), we get a palindrome (94748484749).

The spelling of 12421272328 in words is "twelve billion, four hundred twenty-one million, two hundred seventy-two thousand, three hundred twenty-eight".