31343321112209 has 2 divisors, whose sum is σ = 31343321112210. Its totient is φ = 31343321112208.

The previous prime is 31343321112179. The next prime is 31343321112241. The reversal of 31343321112209 is 90221112334313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31244712551809 + 98608560400 = 5589697^2 + 314020^2 .

It is a cyclic number.

It is not a de Polignac number, because 31343321112209 - 2¹⁶ = 31343321046673 is a prime.

It is not a weakly prime, because it can be changed into another prime (31343321112709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671660556104 + 15671660556105.

It is an arithmetic number, because the mean of its divisors is an integer number (15671660556105).

Almost surely, 2^{31343321112209} is an apocalyptic number.

It is an amenable number.

31343321112209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31343321112209 is an equidigital number, since it uses as much as digits as its factorization.

31343321112209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 31343321112209 in words is "thirty-one trillion, three hundred forty-three billion, three hundred twenty-one million, one hundred twelve thousand, two hundred nine".