21222201221222 has 8 divisors (see below), whose sum is σ = 31865424238272. Its totient is φ = 10600393141800.

The previous prime is 21222201221203. The next prime is 21222201221237. The reversal of 21222201221222 is 22212210222212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5353731929 + ... + 5353735892.

It is an arithmetic number, because the mean of its divisors is an integer number (3983178029784).

Almost surely, 2^{21222201221222} is an apocalyptic number.

21222201221222 is a deficient number, since it is larger than the sum of its proper divisors (10643223017050).

21222201221222 is a wasteful number, since it uses less digits than its factorization.

21222201221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707468814.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21222201221222 its reverse (22212210222212), we get a palindrome (43434411443434).

The spelling of 21222201221222 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-two".