1243103321303 has 2 divisors, whose sum is σ = 1243103321304. Its totient is φ = 1243103321302.

The previous prime is 1243103321249. The next prime is 1243103321351. The reversal of 1243103321303 is 3031233013421.

It is a strong prime.

It is an emirp because it is prime and its reverse (3031233013421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1243103321303 - 2¹² = 1243103317207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243103321363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621551660651 + 621551660652.

It is an arithmetic number, because the mean of its divisors is an integer number (621551660652).

Almost surely, 2^{1243103321303} is an apocalyptic number.

1243103321303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243103321303 is an equidigital number, since it uses as much as digits as its factorization.

1243103321303 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 1243103321303 its reverse (3031233013421), we get a palindrome (4274336334724).

The spelling of 1243103321303 in words is "one trillion, two hundred forty-three billion, one hundred three million, three hundred twenty-one thousand, three hundred three".