12031021130321 has 4 divisors (see below), whose sum is σ = 12738728255652. Its totient is φ = 11323314004992.

The previous prime is 12031021130309. The next prime is 12031021130339. The reversal of 12031021130321 is 12303112013021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6251805130321 + 5779216000000 = 2500361^2 + 2404000^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031021130321 - 2¹⁰ = 12031021129297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031021130293 and 12031021130302.

It is not an unprimeable number, because it can be changed into a prime (12031021130021) 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, 353853562640 + ... + 353853562673.

It is an arithmetic number, because the mean of its divisors is an integer number (3184682063913).

Almost surely, 2^{12031021130321} is an apocalyptic number.

It is an amenable number.

12031021130321 is a deficient number, since it is larger than the sum of its proper divisors (707707125331).

12031021130321 is an equidigital number, since it uses as much as digits as its factorization.

12031021130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707707125330.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12031021130321 its reverse (12303112013021), we get a palindrome (24334133143342).

The spelling of 12031021130321 in words is "twelve trillion, thirty-one billion, twenty-one million, one hundred thirty thousand, three hundred twenty-one".