1321404305005 has 16 divisors (see below), whose sum is σ = 1629664210944. Its totient is φ = 1027843473600.

The previous prime is 1321404304999. The next prime is 1321404305021. The reversal of 1321404305005 is 5005034041231.

It is a de Polignac number, because none of the positive numbers 2^k-1321404305005 is a prime.

It is a super-2 number, since 2×1321404305005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2192877 + ... + 2729746.

It is an arithmetic number, because the mean of its divisors is an integer number (101854013184).

Almost surely, 2^{1321404305005} is an apocalyptic number.

It is an amenable number.

1321404305005 is a deficient number, since it is larger than the sum of its proper divisors (308259905939).

1321404305005 is a wasteful number, since it uses less digits than its factorization.

1321404305005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924116.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 1321404305005 its reverse (5005034041231), we get a palindrome (6326438346236).

The spelling of 1321404305005 in words is "one trillion, three hundred twenty-one billion, four hundred four million, three hundred five thousand, five".