1321324004015 has 4 divisors (see below), whose sum is σ = 1585588804824. Its totient is φ = 1057059203208.

The previous prime is 1321324003991. The next prime is 1321324004023. The reversal of 1321324004015 is 5104004231231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321324004015 is a prime.

It is a super-3 number, since 3×1321324004015³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132132400397 + ... + 132132400406.

It is an arithmetic number, because the mean of its divisors is an integer number (396397201206).

Almost surely, 2^{1321324004015} is an apocalyptic number.

1321324004015 is a deficient number, since it is larger than the sum of its proper divisors (264264800809).

1321324004015 is an equidigital number, since it uses as much as digits as its factorization.

1321324004015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264264800808.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1321324004015 its reverse (5104004231231), we get a palindrome (6425328235246).

The spelling of 1321324004015 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-four million, four thousand, fifteen".