21220122200022 has 48 divisors (see below), whose sum is σ = 47233597739328. Its totient is φ = 6881351526000.

The previous prime is 21220122199987. The next prime is 21220122200023. The reversal of 21220122200022 is 22000222102212.

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 = 21220122199968 and 21220122200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220122200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54419628 + ... + 54808175.

It is an arithmetic number, because the mean of its divisors is an integer number (984033286236).

Almost surely, 2^{21220122200022} is an apocalyptic number.

21220122200022 is an abundant number, since it is smaller than the sum of its proper divisors (26013475539306).

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

21220122200022 is a wasteful number, since it uses less digits than its factorization.

21220122200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109228105 (or 109228102 counting only the distinct ones).

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

Adding to 21220122200022 its reverse (22000222102212), we get a palindrome (43220344302234).

The spelling of 21220122200022 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred thousand, twenty-two".