31011332111 has 2 divisors, whose sum is σ = 31011332112. Its totient is φ = 31011332110.

The previous prime is 31011332083. The next prime is 31011332113. The reversal of 31011332111 is 11123311013.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31011332111 is a prime.

Together with 31011332113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31011332111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31011332113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505666055 + 15505666056.

It is an arithmetic number, because the mean of its divisors is an integer number (15505666056).

Almost surely, 2^31011332111 is an apocalyptic number.

31011332111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011332111 is an equidigital number, since it uses as much as digits as its factorization.

31011332111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31011332111 its reverse (11123311013), we get a palindrome (42134643124).

The spelling of 31011332111 in words is "thirty-one billion, eleven million, three hundred thirty-two thousand, one hundred eleven".