21332343226621 has 8 divisors (see below), whose sum is σ = 25813927938240. Its totient is φ = 17209285291968.

The previous prime is 21332343226609. The next prime is 21332343226631. The reversal of 21332343226621 is 12662234323312.

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

It is not a de Polignac number, because 21332343226621 - 2²⁹ = 21331806355709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332343226631) 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, 89631694111 + ... + 89631694348.

It is an arithmetic number, because the mean of its divisors is an integer number (3226740992280).

Almost surely, 2^{21332343226621} is an apocalyptic number.

It is an amenable number.

21332343226621 is a deficient number, since it is larger than the sum of its proper divisors (4481584711619).

21332343226621 is a wasteful number, since it uses less digits than its factorization.

21332343226621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179263388483.

The product of its digits is 373248, while the sum is 40.

Adding to 21332343226621 its reverse (12662234323312), we get a palindrome (33994577549933).

The spelling of 21332343226621 in words is "twenty-one trillion, three hundred thirty-two billion, three hundred forty-three million, two hundred twenty-six thousand, six hundred twenty-one".