12103130021 has 4 divisors (see below), whose sum is σ = 12103506912. Its totient is φ = 12102753132.

The previous prime is 12103129981. The next prime is 12103130027. The reversal of 12103130021 is 12003130121.

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 a de Polignac number, because none of the positive numbers 2^k-12103130021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12103129978 and 12103130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103130027) 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, 135275 + ... + 206168.

It is an arithmetic number, because the mean of its divisors is an integer number (3025876728).

Almost surely, 2^12103130021 is an apocalyptic number.

It is an amenable number.

12103130021 is a deficient number, since it is larger than the sum of its proper divisors (376891).

12103130021 is an equidigital number, since it uses as much as digits as its factorization.

12103130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376890.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12103130021 its reverse (12003130121), we get a palindrome (24106260142).

The spelling of 12103130021 in words is "twelve billion, one hundred three million, one hundred thirty thousand, twenty-one".