1321003302263 has 2 divisors, whose sum is σ = 1321003302264. Its totient is φ = 1321003302262.

The previous prime is 1321003302253. The next prime is 1321003302337. The reversal of 1321003302263 is 3622033001231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321003302263 - 2⁸ = 1321003302007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321003302253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660501651131 + 660501651132.

It is an arithmetic number, because the mean of its divisors is an integer number (660501651132).

Almost surely, 2^{1321003302263} is an apocalyptic number.

1321003302263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321003302263 is an equidigital number, since it uses as much as digits as its factorization.

1321003302263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1321003302263 its reverse (3622033001231), we get a palindrome (4943036303494).

The spelling of 1321003302263 in words is "one trillion, three hundred twenty-one billion, three million, three hundred two thousand, two hundred sixty-three".