21222101000222 has 16 divisors (see below), whose sum is σ = 33807519720432. Its totient is φ = 9956699237760.

The previous prime is 21222101000153. The next prime is 21222101000227. The reversal of 21222101000222 is 22200010122212.

It is a happy number.

It is a super-2 number, since 2×21222101000222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21222101000222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222101000227) 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, 942857993 + ... + 942880500.

It is an arithmetic number, because the mean of its divisors is an integer number (2112969982527).

Almost surely, 2^{21222101000222} is an apocalyptic number.

21222101000222 is a deficient number, since it is larger than the sum of its proper divisors (12585418720210).

21222101000222 is a wasteful number, since it uses less digits than its factorization.

21222101000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885738843.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222101000222 its reverse (22200010122212), we get a palindrome (43422111122434).

The spelling of 21222101000222 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred one million, two hundred twenty-two", and thus it is an aban number.