1243363123213 has 2 divisors, whose sum is σ = 1243363123214. Its totient is φ = 1243363123212.

The previous prime is 1243363123151. The next prime is 1243363123237. The reversal of 1243363123213 is 3123213633421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946209489289 + 297153633924 = 972733^2 + 545118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243363123213 - 2³⁷ = 1105924169741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243363123243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621681561606 + 621681561607.

It is an arithmetic number, because the mean of its divisors is an integer number (621681561607).

Almost surely, 2^{1243363123213} is an apocalyptic number.

It is an amenable number.

1243363123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243363123213 is an equidigital number, since it uses as much as digits as its factorization.

1243363123213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 34.

Adding to 1243363123213 its reverse (3123213633421), we get a palindrome (4366576756634).

The spelling of 1243363123213 in words is "one trillion, two hundred forty-three billion, three hundred sixty-three million, one hundred twenty-three thousand, two hundred thirteen".