12120034321 has 4 divisors (see below), whose sum is σ = 12120901632. Its totient is φ = 12119167012.

The previous prime is 12120034271. The next prime is 12120034387. The reversal of 12120034321 is 12343002121.

It is a happy number.

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: 12343002121 = 263 ⋅46931567.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120034321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120034021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412345 + ... + 440758.

It is an arithmetic number, because the mean of its divisors is an integer number (3030225408).

Almost surely, 2^12120034321 is an apocalyptic number.

It is an amenable number.

12120034321 is a deficient number, since it is larger than the sum of its proper divisors (867311).

12120034321 is an equidigital number, since it uses as much as digits as its factorization.

12120034321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867310.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12120034321 its reverse (12343002121), we get a palindrome (24463036442).

The spelling of 12120034321 in words is "twelve billion, one hundred twenty million, thirty-four thousand, three hundred twenty-one".