12103432321 has 4 divisors (see below), whose sum is σ = 12110458672. Its totient is φ = 12096405972.

The previous prime is 12103432279. The next prime is 12103432361. The reversal of 12103432321 is 12323430121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12323430121 = 2011 ⋅6128011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12103432321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12103432292 and 12103432301.

It is not an unprimeable number, because it can be changed into a prime (12103432361) 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, 3510591 + ... + 3514036.

It is an arithmetic number, because the mean of its divisors is an integer number (3027614668).

Almost surely, 2^12103432321 is an apocalyptic number.

It is an amenable number.

12103432321 is a deficient number, since it is larger than the sum of its proper divisors (7026351).

12103432321 is an equidigital number, since it uses as much as digits as its factorization.

12103432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026350.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 12103432321 its reverse (12323430121), we get a palindrome (24426862442).

The spelling of 12103432321 in words is "twelve billion, one hundred three million, four hundred thirty-two thousand, three hundred twenty-one".