31371311011 has 2 divisors, whose sum is σ = 31371311012. Its totient is φ = 31371311010.

The previous prime is 31371311009. The next prime is 31371311017. The reversal of 31371311011 is 11011317313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31371311011 - 2¹ = 31371311009 is a prime.

Together with 31371311009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31371311017) 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, 15685655505 + 15685655506.

It is an arithmetic number, because the mean of its divisors is an integer number (15685655506).

Almost surely, 2^31371311011 is an apocalyptic number.

31371311011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31371311011 is an equidigital number, since it uses as much as digits as its factorization.

31371311011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 22.

Adding to 31371311011 its reverse (11011317313), we get a palindrome (42382628324).

The spelling of 31371311011 in words is "thirty-one billion, three hundred seventy-one million, three hundred eleven thousand, eleven".