31011113333197 has 2 divisors, whose sum is σ = 31011113333198. Its totient is φ = 31011113333196.

The previous prime is 31011113333153. The next prime is 31011113333243. The reversal of 31011113333197 is 79133331111013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30408982340356 + 602130992841 = 5514434^2 + 775971^2 .

It is a cyclic number.

It is not a de Polignac number, because 31011113333197 - 2³¹ = 31008965849549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31011113333147) 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, 15505556666598 + 15505556666599.

It is an arithmetic number, because the mean of its divisors is an integer number (15505556666599).

Almost surely, 2^{31011113333197} is an apocalyptic number.

It is an amenable number.

31011113333197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011113333197 is an equidigital number, since it uses as much as digits as its factorization.

31011113333197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309, while the sum is 37.

The spelling of 31011113333197 in words is "thirty-one trillion, eleven billion, one hundred thirteen million, three hundred thirty-three thousand, one hundred ninety-seven".