143311616321 has 2 divisors, whose sum is σ = 143311616322. Its totient is φ = 143311616320.

The previous prime is 143311616311. The next prime is 143311616353. The reversal of 143311616321 is 123616113341.

It is an a-pointer prime, because the next prime (143311616353) can be obtained adding 143311616321 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139834863025 + 3476753296 = 373945^2 + 58964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143311616321 is a prime.

It is not a weakly prime, because it can be changed into another prime (143311616311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71655808160 + 71655808161.

It is an arithmetic number, because the mean of its divisors is an integer number (71655808161).

Almost surely, 2^143311616321 is an apocalyptic number.

It is an amenable number.

143311616321 is a deficient number, since it is larger than the sum of its proper divisors (1).

143311616321 is an equidigital number, since it uses as much as digits as its factorization.

143311616321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

Adding to 143311616321 its reverse (123616113341), we get a palindrome (266927729662).

The spelling of 143311616321 in words is "one hundred forty-three billion, three hundred eleven million, six hundred sixteen thousand, three hundred twenty-one".