1305312321143 has 2 divisors, whose sum is σ = 1305312321144. Its totient is φ = 1305312321142.

The previous prime is 1305312321091. The next prime is 1305312321149. The reversal of 1305312321143 is 3411232135031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305312321143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305312321149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652656160571 + 652656160572.

It is an arithmetic number, because the mean of its divisors is an integer number (652656160572).

Almost surely, 2^{1305312321143} is an apocalyptic number.

1305312321143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305312321143 is an equidigital number, since it uses as much as digits as its factorization.

1305312321143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 1305312321143 its reverse (3411232135031), we get a palindrome (4716544456174).

The spelling of 1305312321143 in words is "one trillion, three hundred five billion, three hundred twelve million, three hundred twenty-one thousand, one hundred forty-three".