31111112017 has 2 divisors, whose sum is σ = 31111112018. Its totient is φ = 31111112016.

The previous prime is 31111111957. The next prime is 31111112027. The reversal of 31111112017 is 71021111113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30965088961 + 146023056 = 175969^2 + 12084^2 .

It is a cyclic number.

It is not a de Polignac number, because 31111112017 - 2¹¹ = 31111109969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31111111985 and 31111112003.

It is not a weakly prime, because it can be changed into another prime (31111112027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555556008 + 15555556009.

It is an arithmetic number, because the mean of its divisors is an integer number (15555556009).

Almost surely, 2^31111112017 is an apocalyptic number.

It is an amenable number.

31111112017 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111112017 is an equidigital number, since it uses as much as digits as its factorization.

31111112017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 19.

The spelling of 31111112017 in words is "thirty-one billion, one hundred eleven million, one hundred twelve thousand, seventeen".