12031201321 has 8 divisors (see below), whose sum is σ = 12226762184. Its totient is φ = 11836471680.

The previous prime is 12031201279. The next prime is 12031201327. The reversal of 12031201321 is 12310213021.

It can be written as a sum of positive squares in 4 ways, for example, as 239630400 + 11791570921 = 15480^2 + 108589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12031201321 - 2⁹ = 12031200809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031201295 and 12031201304.

It is not an unprimeable number, because it can be changed into a prime (12031201327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178590 + ... + 236551.

It is an arithmetic number, because the mean of its divisors is an integer number (1528345273).

Almost surely, 2^12031201321 is an apocalyptic number.

It is an amenable number.

12031201321 is a deficient number, since it is larger than the sum of its proper divisors (195560863).

12031201321 is an equidigital number, since it uses as much as digits as its factorization.

12031201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415611.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12031201321 its reverse (12310213021), we get a palindrome (24341414342).

The spelling of 12031201321 in words is "twelve billion, thirty-one million, two hundred one thousand, three hundred twenty-one".