1321310534343 has 16 divisors (see below), whose sum is σ = 1865433553920. Its totient is φ = 829033600896.

The previous prime is 1321310534329. The next prime is 1321310534359. The reversal of 1321310534343 is 3434350131231.

It is a happy number.

It is not a de Polignac number, because 1321310534343 - 2⁸ = 1321310534087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321310534443) 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, 1495596 + ... + 2208942.

It is an arithmetic number, because the mean of its divisors is an integer number (116589597120).

Almost surely, 2^{1321310534343} is an apocalyptic number.

1321310534343 is a deficient number, since it is larger than the sum of its proper divisors (544123019577).

1321310534343 is a wasteful number, since it uses less digits than its factorization.

1321310534343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749686.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 1321310534343 its reverse (3434350131231), we get a palindrome (4755660665574).

The spelling of 1321310534343 in words is "one trillion, three hundred twenty-one billion, three hundred ten million, five hundred thirty-four thousand, three hundred forty-three".