21222110012022 has 48 divisors (see below), whose sum is σ = 46813883800320. Its totient is φ = 6946958085936.

The previous prime is 21222110011897. The next prime is 21222110012039. The reversal of 21222110012022 is 22021001122212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21222110011986 and 21222110012004.

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 23 ways as a sum of consecutive naturals, for example, 42280122 + ... + 42779117.

It is an arithmetic number, because the mean of its divisors is an integer number (975289245840).

Almost surely, 2^{21222110012022} is an apocalyptic number.

21222110012022 is an abundant number, since it is smaller than the sum of its proper divisors (25591773788298).

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

21222110012022 is a wasteful number, since it uses less digits than its factorization.

21222110012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85059497 (or 85059494 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222110012022 its reverse (22021001122212), we get a palindrome (43243111134234).

The spelling of 21222110012022 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, twelve thousand, twenty-two".