21133302221 has 8 divisors (see below), whose sum is σ = 22054994304. Its totient is φ = 20211847920.

The previous prime is 21133302199. The next prime is 21133302227. The reversal of 21133302221 is 12220333112.

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 21133302221 - 2¹⁸ = 21133040077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133302193 and 21133302202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133302227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135875 + ... + 246431.

It is an arithmetic number, because the mean of its divisors is an integer number (2756874288).

Almost surely, 2^21133302221 is an apocalyptic number.

It is an amenable number.

21133302221 is a deficient number, since it is larger than the sum of its proper divisors (921692083).

21133302221 is a wasteful number, since it uses less digits than its factorization.

21133302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118891.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21133302221 its reverse (12220333112), we get a palindrome (33353635333).

The spelling of 21133302221 in words is "twenty-one billion, one hundred thirty-three million, three hundred two thousand, two hundred twenty-one".