120731231317 has 2 divisors, whose sum is σ = 120731231318. Its totient is φ = 120731231316.

The previous prime is 120731231263. The next prime is 120731231371. The reversal of 120731231317 is 713132137021.

Together with next prime (120731231371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (120731231263) and next prime (120731231371).

It can be written as a sum of positive squares in only one way, i.e., 94053235761 + 26677995556 = 306681^2 + 163334^2 .

It is an emirp because it is prime and its reverse (713132137021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120731231317 - 2⁷ = 120731231189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120731231617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60365615658 + 60365615659.

It is an arithmetic number, because the mean of its divisors is an integer number (60365615659).

Almost surely, 2^120731231317 is an apocalyptic number.

It is an amenable number.

120731231317 is a deficient number, since it is larger than the sum of its proper divisors (1).

120731231317 is an equidigital number, since it uses as much as digits as its factorization.

120731231317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

Adding to 120731231317 its reverse (713132137021), we get a palindrome (833863368338).

The spelling of 120731231317 in words is "one hundred twenty billion, seven hundred thirty-one million, two hundred thirty-one thousand, three hundred seventeen".