1321543104103 has 16 divisors (see below), whose sum is σ = 1371017217024. Its totient is φ = 1272503594880.

The previous prime is 1321543104061. The next prime is 1321543104107. The reversal of 1321543104103 is 3014013451231.

It is a cyclic number.

It is not a de Polignac number, because 1321543104103 - 2³⁷ = 1184104150631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321543104107) 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 in 15 ways as a sum of consecutive naturals, for example, 11674351 + ... + 11787007.

It is an arithmetic number, because the mean of its divisors is an integer number (85688576064).

Almost surely, 2^{1321543104103} is an apocalyptic number.

1321543104103 is a deficient number, since it is larger than the sum of its proper divisors (49474112921).

1321543104103 is a wasteful number, since it uses less digits than its factorization.

1321543104103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114582.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 1321543104103 its reverse (3014013451231), we get a palindrome (4335556555334).

The spelling of 1321543104103 in words is "one trillion, three hundred twenty-one billion, five hundred forty-three million, one hundred four thousand, one hundred three".