31320302011321 has 2 divisors, whose sum is σ = 31320302011322. Its totient is φ = 31320302011320.

The previous prime is 31320302011291. The next prime is 31320302011387. The reversal of 31320302011321 is 12311020302313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19192600236096 + 12127701775225 = 4380936^2 + 3482485^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320302011321 - 2³⁵ = 31285942272953 is a prime.

It is a super-2 number, since 2×31320302011321² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320302011292 and 31320302011301.

It is not a weakly prime, because it can be changed into another prime (31320302071321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660151005660 + 15660151005661.

It is an arithmetic number, because the mean of its divisors is an integer number (15660151005661).

Almost surely, 2^{31320302011321} is an apocalyptic number.

It is an amenable number.

31320302011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320302011321 is an equidigital number, since it uses as much as digits as its factorization.

31320302011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31320302011321 its reverse (12311020302313), we get a palindrome (43631322313634).

The spelling of 31320302011321 in words is "thirty-one trillion, three hundred twenty billion, three hundred two million, eleven thousand, three hundred twenty-one".