31321113332309 has 2 divisors, whose sum is σ = 31321113332310. Its totient is φ = 31321113332308.

The previous prime is 31321113332281. The next prime is 31321113332357. The reversal of 31321113332309 is 90323331112313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30804475831684 + 516637500625 = 5550178^2 + 718775^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321113332309 - 2⁴⁴ = 13728927287893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321113331309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660556666154 + 15660556666155.

It is an arithmetic number, because the mean of its divisors is an integer number (15660556666155).

Almost surely, 2^{31321113332309} is an apocalyptic number.

It is an amenable number.

31321113332309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321113332309 is an equidigital number, since it uses as much as digits as its factorization.

31321113332309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 35.

The spelling of 31321113332309 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred thirteen million, three hundred thirty-two thousand, three hundred nine".