1321143305415 has 16 divisors (see below), whose sum is σ = 2124559391328. Its totient is φ = 701033062016.

The previous prime is 1321143305369. The next prime is 1321143305453. The reversal of 1321143305415 is 5145033411231.

It is a cyclic number.

It is not a de Polignac number, because 1321143305415 - 2⁹ = 1321143304903 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 223540752 + ... + 223546661.

It is an arithmetic number, because the mean of its divisors is an integer number (132784961958).

Almost surely, 2^{1321143305415} is an apocalyptic number.

1321143305415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321143305415 is a deficient number, since it is larger than the sum of its proper divisors (803416085913).

1321143305415 is a wasteful number, since it uses less digits than its factorization.

1321143305415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447087618.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 1321143305415 its reverse (5145033411231), we get a palindrome (6466176716646).

The spelling of 1321143305415 in words is "one trillion, three hundred twenty-one billion, one hundred forty-three million, three hundred five thousand, four hundred fifteen".