1321330021231 has 4 divisors (see below), whose sum is σ = 1441450932264. Its totient is φ = 1201209110200.

The previous prime is 1321330021199. The next prime is 1321330021241. The reversal of 1321330021231 is 1321200331231.

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

It is not a de Polignac number, because 1321330021231 - 2⁵ = 1321330021199 is a prime.

It is a super-2 number, since 2×1321330021231² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321330021241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60060455500 + ... + 60060455521.

It is an arithmetic number, because the mean of its divisors is an integer number (360362733066).

Almost surely, 2^{1321330021231} is an apocalyptic number.

1321330021231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321330021231 is a deficient number, since it is larger than the sum of its proper divisors (120120911033).

1321330021231 is a wasteful number, since it uses less digits than its factorization.

1321330021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120120911032.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1321330021231 its reverse (1321200331231), we get a palindrome (2642530352462).

The spelling of 1321330021231 in words is "one trillion, three hundred twenty-one billion, three hundred thirty million, twenty-one thousand, two hundred thirty-one".