12012321100321 has 4 divisors (see below), whose sum is σ = 12012449636272. Its totient is φ = 12012192564372.

The previous prime is 12012321100291. The next prime is 12012321100387. The reversal of 12012321100321 is 12300112321021.

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 not a de Polignac number, because 12012321100321 - 2⁷ = 12012321100193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012321100121) 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, 64127691 + ... + 64314736.

It is an arithmetic number, because the mean of its divisors is an integer number (3003112409068).

Almost surely, 2^{12012321100321} is an apocalyptic number.

It is an amenable number.

12012321100321 is a deficient number, since it is larger than the sum of its proper divisors (128535951).

12012321100321 is an equidigital number, since it uses as much as digits as its factorization.

12012321100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128535950.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12012321100321 its reverse (12300112321021), we get a palindrome (24312433421342).

The spelling of 12012321100321 in words is "twelve trillion, twelve billion, three hundred twenty-one million, one hundred thousand, three hundred twenty-one".