31012052011 has 2 divisors, whose sum is σ = 31012052012. Its totient is φ = 31012052010.

The previous prime is 31012052009. The next prime is 31012052081. The reversal of 31012052011 is 11025021013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31012052011 - 2¹ = 31012052009 is a prime.

Together with 31012052009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31012052081) 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, 15506026005 + 15506026006.

It is an arithmetic number, because the mean of its divisors is an integer number (15506026006).

Almost surely, 2^31012052011 is an apocalyptic number.

31012052011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012052011 is an equidigital number, since it uses as much as digits as its factorization.

31012052011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 31012052011 its reverse (11025021013), we get a palindrome (42037073024).

The spelling of 31012052011 in words is "thirty-one billion, twelve million, fifty-two thousand, eleven".