31112202197917 has 2 divisors, whose sum is σ = 31112202197918. Its totient is φ = 31112202197916.

The previous prime is 31112202197911. The next prime is 31112202197929. The reversal of 31112202197917 is 71979120221113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27173064902841 + 3939137295076 = 5212779^2 + 1984726^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112202197917 - 2¹¹ = 31112202195869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112202197911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556101098958 + 15556101098959.

It is an arithmetic number, because the mean of its divisors is an integer number (15556101098959).

Almost surely, 2^{31112202197917} is an apocalyptic number.

It is an amenable number.

31112202197917 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112202197917 is an equidigital number, since it uses as much as digits as its factorization.

31112202197917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 46.

The spelling of 31112202197917 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, one hundred ninety-seven thousand, nine hundred seventeen".