31124012011 has 2 divisors, whose sum is σ = 31124012012. Its totient is φ = 31124012010.

The previous prime is 31124011969. The next prime is 31124012027. The reversal of 31124012011 is 11021042113.

It is an a-pointer prime, because the next prime (31124012027) can be obtained adding 31124012011 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31124012011 - 2²⁵ = 31090457579 is a prime.

It is not a weakly prime, because it can be changed into another prime (31124042011) 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, 15562006005 + 15562006006.

It is an arithmetic number, because the mean of its divisors is an integer number (15562006006).

Almost surely, 2^31124012011 is an apocalyptic number.

31124012011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124012011 is an equidigital number, since it uses as much as digits as its factorization.

31124012011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31124012011 its reverse (11021042113), we get a palindrome (42145054124).

The spelling of 31124012011 in words is "thirty-one billion, one hundred twenty-four million, twelve thousand, eleven".