1031320231397 has 2 divisors, whose sum is σ = 1031320231398. Its totient is φ = 1031320231396.

The previous prime is 1031320231297. The next prime is 1031320231399. The reversal of 1031320231397 is 7931320231301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521932557601 + 509387673796 = 722449^2 + 713714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031320231397 - 2²⁰ = 1031319182821 is a prime.

Together with 1031320231399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031320231399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660115698 + 515660115699.

It is an arithmetic number, because the mean of its divisors is an integer number (515660115699).

Almost surely, 2^{1031320231397} is an apocalyptic number.

It is an amenable number.

1031320231397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031320231397 is an equidigital number, since it uses as much as digits as its factorization.

1031320231397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

Adding to 1031320231397 its reverse (7931320231301), we get a palindrome (8962640462698).

The spelling of 1031320231397 in words is "one trillion, thirty-one billion, three hundred twenty million, two hundred thirty-one thousand, three hundred ninety-seven".