12103200121 has 4 divisors (see below), whose sum is σ = 12148193700. Its totient is φ = 12058206544.

The previous prime is 12103200113. The next prime is 12103200169. The reversal of 12103200121 is 12100230121.

12103200121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3697977721 + 8405222400 = 60811^2 + 91680^2 .

It is a cyclic number.

It is not a de Polignac number, because 12103200121 - 2³ = 12103200113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103200191) 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, 22496386 + ... + 22496923.

It is an arithmetic number, because the mean of its divisors is an integer number (3037048425).

Almost surely, 2^12103200121 is an apocalyptic number.

It is an amenable number.

12103200121 is a deficient number, since it is larger than the sum of its proper divisors (44993579).

12103200121 is an equidigital number, since it uses as much as digits as its factorization.

12103200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44993578.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12103200121 its reverse (12100230121), we get a palindrome (24203430242).

The spelling of 12103200121 in words is "twelve billion, one hundred three million, two hundred thousand, one hundred twenty-one".