12031301321 has 4 divisors (see below), whose sum is σ = 12956786052. Its totient is φ = 11105816592.

The previous prime is 12031301273. The next prime is 12031301323. The reversal of 12031301321 is 12310313021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12310313021 = 53 ⋅232270057.

It can be written as a sum of positive squares in 2 ways, for example, as 6430275721 + 5601025600 = 80189^2 + 74840^2 .

It is not a de Polignac number, because 12031301321 - 2⁶ = 12031301257 is a prime.

It is a super-2 number, since 2×12031301321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031301321.

It is not an unprimeable number, because it can be changed into a prime (12031301323) 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, 462742346 + ... + 462742371.

It is an arithmetic number, because the mean of its divisors is an integer number (3239196513).

Almost surely, 2^12031301321 is an apocalyptic number.

It is an amenable number.

12031301321 is a deficient number, since it is larger than the sum of its proper divisors (925484731).

12031301321 is an equidigital number, since it uses as much as digits as its factorization.

12031301321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925484730.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12031301321 its reverse (12310313021), we get a palindrome (24341614342).

The spelling of 12031301321 in words is "twelve billion, thirty-one million, three hundred one thousand, three hundred twenty-one".