1331023012309 has 2 divisors, whose sum is σ = 1331023012310. Its totient is φ = 1331023012308.

The previous prime is 1331023012259. The next prime is 1331023012313. The reversal of 1331023012309 is 9032103201331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1284300892900 + 46722119409 = 1133270^2 + 216153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331023012309 - 2³¹ = 1328875528661 is a prime.

It is a super-2 number, since 2×1331023012309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331023012339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665511506154 + 665511506155.

It is an arithmetic number, because the mean of its divisors is an integer number (665511506155).

Almost surely, 2^{1331023012309} is an apocalyptic number.

It is an amenable number.

1331023012309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331023012309 is an equidigital number, since it uses as much as digits as its factorization.

1331023012309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 1331023012309 in words is "one trillion, three hundred thirty-one billion, twenty-three million, twelve thousand, three hundred nine".