12112123021103 has 4 divisors (see below), whose sum is σ = 13842426309840. Its totient is φ = 10381819732368.

The previous prime is 12112123021091. The next prime is 12112123021127. The reversal of 12112123021103 is 30112032121121.

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

It is not a de Polignac number, because 12112123021103 - 2³⁴ = 12094943151919 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 (12112123021153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865151644358 + ... + 865151644371.

It is an arithmetic number, because the mean of its divisors is an integer number (3460606577460).

Almost surely, 2^{12112123021103} is an apocalyptic number.

12112123021103 is a deficient number, since it is larger than the sum of its proper divisors (1730303288737).

12112123021103 is an equidigital number, since it uses as much as digits as its factorization.

12112123021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730303288736.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12112123021103 its reverse (30112032121121), we get a palindrome (42224155142224).

The spelling of 12112123021103 in words is "twelve trillion, one hundred twelve billion, one hundred twenty-three million, twenty-one thousand, one hundred three".