12103434021 has 8 divisors (see below), whose sum is σ = 18443328064. Its totient is φ = 6916248000.

The previous prime is 12103434001. The next prime is 12103434037. The reversal of 12103434021 is 12043430121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12103434021 - 2²⁶ = 12036325157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 576354001 = 12103434021 / (1 + 2 + 1 + 0 + 3 + 4 + 3 + 4 + 0 + 2 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103434001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288176980 + ... + 288177021.

It is an arithmetic number, because the mean of its divisors is an integer number (2305416008).

Almost surely, 2^12103434021 is an apocalyptic number.

It is an amenable number.

12103434021 is a deficient number, since it is larger than the sum of its proper divisors (6339894043).

12103434021 is an equidigital number, since it uses as much as digits as its factorization.

12103434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576354011.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12103434021 its reverse (12043430121), we get a palindrome (24146864142).

The spelling of 12103434021 in words is "twelve billion, one hundred three million, four hundred thirty-four thousand, twenty-one".