1321230143 has 2 divisors, whose sum is σ = 1321230144. Its totient is φ = 1321230142.

The previous prime is 1321230109. The next prime is 1321230221. The reversal of 1321230143 is 3410321231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321230143 - 2⁸ = 1321229887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660615071 + 660615072.

It is an arithmetic number, because the mean of its divisors is an integer number (660615072).

Almost surely, 2^1321230143 is an apocalyptic number.

1321230143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321230143 is an equidigital number, since it uses as much as digits as its factorization.

1321230143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321230143 is about 36348.7295926556. The cubic root of 1321230143 is about 1097.3019671299.

Adding to 1321230143 its reverse (3410321231), we get a palindrome (4731551374).

The spelling of 1321230143 in words is "one billion, three hundred twenty-one million, two hundred thirty thousand, one hundred forty-three".