31122231012109 has 2 divisors, whose sum is σ = 31122231012110. Its totient is φ = 31122231012108.

The previous prime is 31122231012091. The next prime is 31122231012133. The reversal of 31122231012109 is 90121013222113.

Together with previous prime (31122231012091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28677845728900 + 2444385283209 = 5355170^2 + 1563453^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122231012109 - 2⁵ = 31122231012077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122231012149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561115506054 + 15561115506055.

It is an arithmetic number, because the mean of its divisors is an integer number (15561115506055).

Almost surely, 2^{31122231012109} is an apocalyptic number.

It is an amenable number.

31122231012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122231012109 is an equidigital number, since it uses as much as digits as its factorization.

31122231012109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 31122231012109 in words is "thirty-one trillion, one hundred twenty-two billion, two hundred thirty-one million, twelve thousand, one hundred nine".