1031321123117 has 2 divisors, whose sum is σ = 1031321123118. Its totient is φ = 1031321123116.

The previous prime is 1031321123111. The next prime is 1031321123141. The reversal of 1031321123117 is 7113211231301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973288794916 + 58032328201 = 986554^2 + 240899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031321123117 - 2²⁰ = 1031320074541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031321123111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660561558 + 515660561559.

It is an arithmetic number, because the mean of its divisors is an integer number (515660561559).

Almost surely, 2^{1031321123117} is an apocalyptic number.

It is an amenable number.

1031321123117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031321123117 is an equidigital number, since it uses as much as digits as its factorization.

1031321123117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 1031321123117 its reverse (7113211231301), we get a palindrome (8144532354418).

The spelling of 1031321123117 in words is "one trillion, thirty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred seventeen".