1321330521331 has 8 divisors (see below), whose sum is σ = 1424797995600. Its totient is φ = 1221255423360.

The previous prime is 1321330521317. The next prime is 1321330521359. The reversal of 1321330521331 is 1331250331231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321330521331 - 2²¹ = 1321328424179 is a prime.

It is a super-2 number, since 2×1321330521331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321330521331.

It is not an unprimeable number, because it can be changed into a prime (1321330521361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848093266 + ... + 848094823.

It is an arithmetic number, because the mean of its divisors is an integer number (178099749450).

Almost surely, 2^{1321330521331} is an apocalyptic number.

1321330521331 is a deficient number, since it is larger than the sum of its proper divisors (103467474269).

1321330521331 is a wasteful number, since it uses less digits than its factorization.

1321330521331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696188149.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 1321330521331 its reverse (1331250331231), we get a palindrome (2652580852562).

The spelling of 1321330521331 in words is "one trillion, three hundred twenty-one billion, three hundred thirty million, five hundred twenty-one thousand, three hundred thirty-one".