21022201221222 has 16 divisors (see below), whose sum is σ = 42257825807472. Its totient is φ = 6971829846240.

The previous prime is 21022201221193. The next prime is 21022201221239. The reversal of 21022201221222 is 22212210222012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8892638929 + ... + 8892641292.

It is an arithmetic number, because the mean of its divisors is an integer number (2641114112967).

Almost surely, 2^{21022201221222} is an apocalyptic number.

21022201221222 is an abundant number, since it is smaller than the sum of its proper divisors (21235624586250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022201221222 is a wasteful number, since it uses less digits than its factorization.

21022201221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17785280423.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21022201221222 its reverse (22212210222012), we get a palindrome (43234411443234).

The spelling of 21022201221222 in words is "twenty-one trillion, twenty-two billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-two".