1321123140413 has 2 divisors, whose sum is σ = 1321123140414. Its totient is φ = 1321123140412.

The previous prime is 1321123140401. The next prime is 1321123140457. The reversal of 1321123140413 is 3140413211231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115226817849 + 205896322564 = 1056043^2 + 453758^2 .

It is an emirp because it is prime and its reverse (3140413211231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321123140413 - 2⁶ = 1321123140349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321123140613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660561570206 + 660561570207.

It is an arithmetic number, because the mean of its divisors is an integer number (660561570207).

Almost surely, 2^{1321123140413} is an apocalyptic number.

It is an amenable number.

1321123140413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321123140413 is an equidigital number, since it uses as much as digits as its factorization.

1321123140413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1321123140413 its reverse (3140413211231), we get a palindrome (4461536351644).

The spelling of 1321123140413 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred forty thousand, four hundred thirteen".