31113311323111 has 2 divisors, whose sum is σ = 31113311323112. Its totient is φ = 31113311323110.

The previous prime is 31113311323099. The next prime is 31113311323177. The reversal of 31113311323111 is 11132311331113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31113311323111 - 2³¹ = 31111163839463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113311623111) 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, 15556655661555 + 15556655661556.

It is an arithmetic number, because the mean of its divisors is an integer number (15556655661556).

Almost surely, 2^{31113311323111} is an apocalyptic number.

31113311323111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113311323111 is an equidigital number, since it uses as much as digits as its factorization.

31113311323111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 25.

Adding to 31113311323111 its reverse (11132311331113), we get a palindrome (42245622654224).

The spelling of 31113311323111 in words is "thirty-one trillion, one hundred thirteen billion, three hundred eleven million, three hundred twenty-three thousand, one hundred eleven".