1321132011321 has 4 divisors (see below), whose sum is σ = 1761509348432. Its totient is φ = 880754674212.

The previous prime is 1321132011299. The next prime is 1321132011341. The reversal of 1321132011321 is 1231102311231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1321132011321 - 2⁵ = 1321132011289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321132011341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220188668551 + ... + 220188668556.

It is an arithmetic number, because the mean of its divisors is an integer number (440377337108).

Almost surely, 2^{1321132011321} is an apocalyptic number.

It is an amenable number.

1321132011321 is a deficient number, since it is larger than the sum of its proper divisors (440377337111).

1321132011321 is an equidigital number, since it uses as much as digits as its factorization.

1321132011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440377337110.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1321132011321 its reverse (1231102311231), we get a palindrome (2552234322552).

The spelling of 1321132011321 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-two million, eleven thousand, three hundred twenty-one".