31113330311111 has 2 divisors, whose sum is σ = 31113330311112. Its totient is φ = 31113330311110.

The previous prime is 31113330311099. The next prime is 31113330311209. The reversal of 31113330311111 is 11111303331113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31113330311111 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113330314111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556665155555 + 15556665155556.

It is an arithmetic number, because the mean of its divisors is an integer number (15556665155556).

Almost surely, 2^{31113330311111} is an apocalyptic number.

31113330311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113330311111 is an equidigital number, since it uses as much as digits as its factorization.

31113330311111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

Adding to 31113330311111 its reverse (11111303331113), we get a palindrome (42224633642224).

The spelling of 31113330311111 in words is "thirty-one trillion, one hundred thirteen billion, three hundred thirty million, three hundred eleven thousand, one hundred eleven".