21332231011321 has 4 divisors (see below), whose sum is σ = 22587068129652. Its totient is φ = 20077393892992.

The previous prime is 21332231011243. The next prime is 21332231011327. The reversal of 21332231011321 is 12311013223312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12609281412025 + 8722949599296 = 3550955^2 + 2953464^2 .

It is not a de Polignac number, because 21332231011321 - 2³¹ = 21330083527673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332231011327) 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, 627418559140 + ... + 627418559173.

It is an arithmetic number, because the mean of its divisors is an integer number (5646767032413).

Almost surely, 2^{21332231011321} is an apocalyptic number.

It is an amenable number.

21332231011321 is a deficient number, since it is larger than the sum of its proper divisors (1254837118331).

21332231011321 is a wasteful number, since it uses less digits than its factorization.

21332231011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254837118330.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21332231011321 its reverse (12311013223312), we get a palindrome (33643244234633).

The spelling of 21332231011321 in words is "twenty-one trillion, three hundred thirty-two billion, two hundred thirty-one million, eleven thousand, three hundred twenty-one".