12103222121 has 4 divisors (see below), whose sum is σ = 12105711744. Its totient is φ = 12100732500.

The previous prime is 12103222111. The next prime is 12103222147. The reversal of 12103222121 is 12122230121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12103222121 - 2¹⁸ = 12102959977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12103222121.

It is not an unprimeable number, because it can be changed into a prime (12103222111) 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, 1237505 + ... + 1247246.

It is an arithmetic number, because the mean of its divisors is an integer number (3026427936).

Almost surely, 2^12103222121 is an apocalyptic number.

It is an amenable number.

12103222121 is a deficient number, since it is larger than the sum of its proper divisors (2489623).

12103222121 is an equidigital number, since it uses as much as digits as its factorization.

12103222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489622.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12103222121 its reverse (12122230121), we get a palindrome (24225452242).

The spelling of 12103222121 in words is "twelve billion, one hundred three million, two hundred twenty-two thousand, one hundred twenty-one".