1331320322321 has 16 divisors (see below), whose sum is σ = 1505542386240. Its totient is φ = 1166575164480.

The previous prime is 1331320322281. The next prime is 1331320322333. The reversal of 1331320322321 is 1232230231331.

It is a de Polignac number, because none of the positive numbers 2^k-1331320322321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331320322351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15241766 + ... + 15328863.

It is an arithmetic number, because the mean of its divisors is an integer number (94096399140).

Almost surely, 2^{1331320322321} is an apocalyptic number.

1331320322321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331320322321 is a deficient number, since it is larger than the sum of its proper divisors (174222063919).

1331320322321 is a wasteful number, since it uses less digits than its factorization.

1331320322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30570784.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1331320322321 its reverse (1232230231331), we get a palindrome (2563550553652).

The spelling of 1331320322321 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, three hundred twenty-two thousand, three hundred twenty-one".