31322321113 has 2 divisors, whose sum is σ = 31322321114. Its totient is φ = 31322321112.

The previous prime is 31322321087. The next prime is 31322321153. The reversal of 31322321113 is 31112322313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29983346649 + 1338974464 = 173157^2 + 36592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31322321113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31322321153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661160556 + 15661160557.

It is an arithmetic number, because the mean of its divisors is an integer number (15661160557).

Almost surely, 2^31322321113 is an apocalyptic number.

It is an amenable number.

31322321113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322321113 is an equidigital number, since it uses as much as digits as its factorization.

31322321113 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31322321113 its reverse (31112322313), we get a palindrome (62434643426).

The spelling of 31322321113 in words is "thirty-one billion, three hundred twenty-two million, three hundred twenty-one thousand, one hundred thirteen".