31320320032321 has 2 divisors, whose sum is σ = 31320320032322. Its totient is φ = 31320320032320.

The previous prime is 31320320032297. The next prime is 31320320032361. The reversal of 31320320032321 is 12323002302313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25619399756721 + 5700920275600 = 5061561^2 + 2387660^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320320032321 - 2⁵ = 31320320032289 is a prime.

It is a super-3 number, since 3×31320320032321³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (31320320032361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660160016160 + 15660160016161.

It is an arithmetic number, because the mean of its divisors is an integer number (15660160016161).

Almost surely, 2^{31320320032321} is an apocalyptic number.

It is an amenable number.

31320320032321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320320032321 is an equidigital number, since it uses as much as digits as its factorization.

31320320032321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31320320032321 its reverse (12323002302313), we get a palindrome (43643322334634).

The spelling of 31320320032321 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty million, thirty-two thousand, three hundred twenty-one".