1321519784303 has 2 divisors, whose sum is σ = 1321519784304. Its totient is φ = 1321519784302.

The previous prime is 1321519784287. The next prime is 1321519784341. The reversal of 1321519784303 is 3034879151231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321519784303 - 2⁴ = 1321519784287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321519787303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660759892151 + 660759892152.

It is an arithmetic number, because the mean of its divisors is an integer number (660759892152).

Almost surely, 2^{1321519784303} is an apocalyptic number.

1321519784303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321519784303 is an equidigital number, since it uses as much as digits as its factorization.

1321519784303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 1321519784303 in words is "one trillion, three hundred twenty-one billion, five hundred nineteen million, seven hundred eighty-four thousand, three hundred three".