12123111000103 has 4 divisors (see below), whose sum is σ = 12126865450840. Its totient is φ = 12119356549368.

The previous prime is 12123111000083. The next prime is 12123111000127. The reversal of 12123111000103 is 30100011132121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123111000103 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 (12123111001103) 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, 1877220525 + ... + 1877226982.

It is an arithmetic number, because the mean of its divisors is an integer number (3031716362710).

Almost surely, 2^{12123111000103} is an apocalyptic number.

12123111000103 is a deficient number, since it is larger than the sum of its proper divisors (3754450737).

12123111000103 is an equidigital number, since it uses as much as digits as its factorization.

12123111000103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754450736.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12123111000103 its reverse (30100011132121), we get a palindrome (42223122132224).

The spelling of 12123111000103 in words is "twelve trillion, one hundred twenty-three billion, one hundred eleven million, one hundred three", and thus it is an aban number.