12121203103 has 4 divisors (see below), whose sum is σ = 12122624248. Its totient is φ = 12119781960.

The previous prime is 12121203047. The next prime is 12121203161. The reversal of 12121203103 is 30130212121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121203103 - 2¹⁷ = 12121072031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121203163) 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, 697701 + ... + 714862.

It is an arithmetic number, because the mean of its divisors is an integer number (3030656062).

Almost surely, 2^12121203103 is an apocalyptic number.

12121203103 is a deficient number, since it is larger than the sum of its proper divisors (1421145).

12121203103 is an equidigital number, since it uses as much as digits as its factorization.

12121203103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421144.

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

Adding to 12121203103 its reverse (30130212121), we get a palindrome (42251415224).

The spelling of 12121203103 in words is "twelve billion, one hundred twenty-one million, two hundred three thousand, one hundred three".