1323351586981 has 2 divisors, whose sum is σ = 1323351586982. Its totient is φ = 1323351586980.

The previous prime is 1323351586967. The next prime is 1323351587069. The reversal of 1323351586981 is 1896851533231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667923714756 + 655427872225 = 817266^2 + 809585^2 .

It is an emirp because it is prime and its reverse (1896851533231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323351586981 is a prime.

It is a super-2 number, since 2×1323351586981² (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 (1323351586181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661675793490 + 661675793491.

It is an arithmetic number, because the mean of its divisors is an integer number (661675793491).

Almost surely, 2^{1323351586981} is an apocalyptic number.

It is an amenable number.

1323351586981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323351586981 is an equidigital number, since it uses as much as digits as its factorization.

1323351586981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 55.

The spelling of 1323351586981 in words is "one trillion, three hundred twenty-three billion, three hundred fifty-one million, five hundred eighty-six thousand, nine hundred eighty-one".