12031001321 has 2 divisors, whose sum is σ = 12031001322. Its totient is φ = 12031001320.

The previous prime is 12031001287. The next prime is 12031001341. The reversal of 12031001321 is 12310013021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11106841321 + 924160000 = 105389^2 + 30400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031001321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031001296 and 12031001305.

It is not a weakly prime, because it can be changed into another prime (12031001341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015500660 + 6015500661.

It is an arithmetic number, because the mean of its divisors is an integer number (6015500661).

Almost surely, 2^12031001321 is an apocalyptic number.

It is an amenable number.

12031001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031001321 is an equidigital number, since it uses as much as digits as its factorization.

12031001321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12031001321 its reverse (12310013021), we get a palindrome (24341014342).

The spelling of 12031001321 in words is "twelve billion, thirty-one million, one thousand, three hundred twenty-one".