21220200211122 has 96 divisors (see below), whose sum is σ = 51012149760000. Its totient is φ = 6320730417120.

The previous prime is 21220200211079. The next prime is 21220200211123. The reversal of 21220200211122 is 22111200202212.

It is a happy number.

21220200211122 is a `hidden beast` number, since 21 + 220 + 200 + 211 + 12 + 2 = 666.

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 = 21220200211095 and 21220200211104.

It is not an unprimeable number, because it can be changed into a prime (21220200211123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121393779 + ... + 121568457.

It is an arithmetic number, because the mean of its divisors is an integer number (531376560000).

Almost surely, 2^{21220200211122} is an apocalyptic number.

21220200211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220200211122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25506074880000).

21220200211122 is an abundant number, since it is smaller than the sum of its proper divisors (29791949548878).

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

21220200211122 is a wasteful number, since it uses less digits than its factorization.

21220200211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185156 (or 185153 counting only the distinct ones).

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

Adding to 21220200211122 its reverse (22111200202212), we get a palindrome (43331400413334).

The spelling of 21220200211122 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, two hundred eleven thousand, one hundred twenty-two".