31123430011 has 2 divisors, whose sum is σ = 31123430012. Its totient is φ = 31123430010.

The previous prime is 31123429993. The next prime is 31123430047. The reversal of 31123430011 is 11003432113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31123430011 - 2¹¹ = 31123427963 is a prime.

It is not a weakly prime, because it can be changed into another prime (31123430411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561715005 + 15561715006.

It is an arithmetic number, because the mean of its divisors is an integer number (15561715006).

Almost surely, 2^31123430011 is an apocalyptic number.

31123430011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123430011 is an equidigital number, since it uses as much as digits as its factorization.

31123430011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31123430011 its reverse (11003432113), we get a palindrome (42126862124).

The spelling of 31123430011 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirty thousand, eleven".