31102311230209 has 2 divisors, whose sum is σ = 31102311230210. Its totient is φ = 31102311230208.

The previous prime is 31102311230189. The next prime is 31102311230227. The reversal of 31102311230209 is 90203211320113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15702769379584 + 15399541850625 = 3962672^2 + 3924225^2 .

It is a cyclic number.

It is not a de Polignac number, because 31102311230209 - 2⁹ = 31102311229697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31102311230299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551155615104 + 15551155615105.

It is an arithmetic number, because the mean of its divisors is an integer number (15551155615105).

Almost surely, 2^{31102311230209} is an apocalyptic number.

It is an amenable number.

31102311230209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102311230209 is an equidigital number, since it uses as much as digits as its factorization.

31102311230209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 31102311230209 in words is "thirty-one trillion, one hundred two billion, three hundred eleven million, two hundred thirty thousand, two hundred nine".