12103121320 has 16 divisors (see below), whose sum is σ = 27232023060. Its totient is φ = 4841248512.

The previous prime is 12103121299. The next prime is 12103121323. The reversal of 12103121320 is 2312130121.

It can be written as a sum of positive squares in 2 ways, for example, as 12043306564 + 59814756 = 109742^2 + 7734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12103121294 and 12103121303.

It is not an unprimeable number, because it can be changed into a prime (12103121323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151288977 + ... + 151289056.

Almost surely, 2^12103121320 is an apocalyptic number.

12103121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103121320 is an abundant number, since it is smaller than the sum of its proper divisors (15128901740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12103121320 is a wasteful number, since it uses less digits than its factorization.

12103121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302578044 (or 302578040 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12103121320 its reverse (2312130121), we get a palindrome (14415251441).

It can be divided in two parts, 12103121 and 320, that added together give a square (12103441 = 3479²).

The spelling of 12103121320 in words is "twelve billion, one hundred three million, one hundred twenty-one thousand, three hundred twenty".