21222000122022 has 24 divisors (see below), whose sum is σ = 52549714588176. Its totient is φ = 6063428606256.

The previous prime is 21222000121957. The next prime is 21222000122039. The reversal of 21222000122022 is 22022100022212.

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 = 21222000121986 and 21222000122004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84214286073 + ... + 84214286324.

It is an arithmetic number, because the mean of its divisors is an integer number (2189571441174).

Almost surely, 2^{21222000122022} is an apocalyptic number.

21222000122022 is an abundant number, since it is smaller than the sum of its proper divisors (31327714466154).

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

21222000122022 is a wasteful number, since it uses less digits than its factorization.

21222000122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168428572412 (or 168428572409 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222000122022 its reverse (22022100022212), we get a palindrome (43244100144234).

The spelling of 21222000122022 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two thousand, twenty-two".