312131112011 has 2 divisors, whose sum is σ = 312131112012. Its totient is φ = 312131112010.

The previous prime is 312131112001. The next prime is 312131112043. The reversal of 312131112011 is 110211131213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312131112011 is a prime.

It is not a weakly prime, because it can be changed into another prime (312131112001) 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, 156065556005 + 156065556006.

It is an arithmetic number, because the mean of its divisors is an integer number (156065556006).

Almost surely, 2^312131112011 is an apocalyptic number.

312131112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131112011 is an equidigital number, since it uses as much as digits as its factorization.

312131112011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 312131112011 its reverse (110211131213), we get a palindrome (422342243224).

The spelling of 312131112011 in words is "three hundred twelve billion, one hundred thirty-one million, one hundred twelve thousand, eleven".