1243423320311 has 2 divisors, whose sum is σ = 1243423320312. Its totient is φ = 1243423320310.

The previous prime is 1243423320299. The next prime is 1243423320323. The reversal of 1243423320311 is 1130233243421.

It is a balanced prime because it is at equal distance from previous prime (1243423320299) and next prime (1243423320323).

It is an emirp because it is prime and its reverse (1130233243421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243423320311 is a prime.

It is a super-2 number, since 2×1243423320311² (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 (1243423320611) 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, 621711660155 + 621711660156.

It is an arithmetic number, because the mean of its divisors is an integer number (621711660156).

Almost surely, 2^{1243423320311} is an apocalyptic number.

1243423320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243423320311 is an equidigital number, since it uses as much as digits as its factorization.

1243423320311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1243423320311 its reverse (1130233243421), we get a palindrome (2373656563732).

The spelling of 1243423320311 in words is "one trillion, two hundred forty-three billion, four hundred twenty-three million, three hundred twenty thousand, three hundred eleven".