12123021103 has 16 divisors (see below), whose sum is σ = 12608719200. Its totient is φ = 11646222336.

The previous prime is 12123021083. The next prime is 12123021109. The reversal of 12123021103 is 30112032121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123021103 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 (12123021109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1607700 + ... + 1615222.

It is an arithmetic number, because the mean of its divisors is an integer number (788044950).

Almost surely, 2^12123021103 is an apocalyptic number.

12123021103 is a deficient number, since it is larger than the sum of its proper divisors (485698097).

12123021103 is an equidigital number, since it uses as much as digits as its factorization.

12123021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8106.

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

Adding to 12123021103 its reverse (30112032121), we get a palindrome (42235053224).

The spelling of 12123021103 in words is "twelve billion, one hundred twenty-three million, twenty-one thousand, one hundred three".