31012001071 has 2 divisors, whose sum is σ = 31012001072. Its totient is φ = 31012001070.

The previous prime is 31012001017. The next prime is 31012001081. The reversal of 31012001071 is 17010021013.

Together with previous prime (31012001017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012001071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012001081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506000535 + 15506000536.

It is an arithmetic number, because the mean of its divisors is an integer number (15506000536).

Almost surely, 2^31012001071 is an apocalyptic number.

31012001071 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012001071 is an equidigital number, since it uses as much as digits as its factorization.

31012001071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 16.

Adding to 31012001071 its reverse (17010021013), we get a palindrome (48022022084).

The spelling of 31012001071 in words is "thirty-one billion, twelve million, one thousand, seventy-one".