21221330222 has 8 divisors (see below), whose sum is σ = 31836157272. Its totient is φ = 10609277800.

The previous prime is 21221330219. The next prime is 21221330293. The reversal of 21221330222 is 22203312212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21221330194 and 21221330203.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 674429 + ... + 705192.

It is an arithmetic number, because the mean of its divisors is an integer number (3979519659).

Almost surely, 2^21221330222 is an apocalyptic number.

21221330222 is a deficient number, since it is larger than the sum of its proper divisors (10614827050).

21221330222 is a wasteful number, since it uses less digits than its factorization.

21221330222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387314.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21221330222 its reverse (22203312212), we get a palindrome (43424642434).

The spelling of 21221330222 in words is "twenty-one billion, two hundred twenty-one million, three hundred thirty thousand, two hundred twenty-two".