1321213304303 has 2 divisors, whose sum is σ = 1321213304304. Its totient is φ = 1321213304302.

The previous prime is 1321213304227. The next prime is 1321213304309. The reversal of 1321213304303 is 3034033121231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321213304303 - 2¹⁰ = 1321213303279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321213304309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606652151 + 660606652152.

It is an arithmetic number, because the mean of its divisors is an integer number (660606652152).

Almost surely, 2^{1321213304303} is an apocalyptic number.

1321213304303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321213304303 is an equidigital number, since it uses as much as digits as its factorization.

1321213304303 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 1321213304303 its reverse (3034033121231), we get a palindrome (4355246425534).

The spelling of 1321213304303 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, three hundred four thousand, three hundred three".