21220220110122 has 96 divisors (see below), whose sum is σ = 50847832788480. Its totient is φ = 6341799951360.

The previous prime is 21220220110099. The next prime is 21220220110163. The reversal of 21220220110122 is 22101102202212.

It is a happy number.

21220220110122 is a `hidden beast` number, since 212 + 2 + 0 + 220 + 110 + 122 = 666.

It is a super-2 number, since 2×21220220110122² (a number of 27 digits) contains 22 as substring.

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 = 21220220110095 and 21220220110104.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 219898279 + ... + 219994757.

It is an arithmetic number, because the mean of its divisors is an integer number (529664924880).

Almost surely, 2^{21220220110122} is an apocalyptic number.

21220220110122 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 21220220110122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25423916394240).

21220220110122 is an abundant number, since it is smaller than the sum of its proper divisors (29627612678358).

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

21220220110122 is a wasteful number, since it uses less digits than its factorization.

21220220110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111788 (or 111785 counting only the distinct ones).

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

Adding to 21220220110122 its reverse (22101102202212), we get a palindrome (43321322312334).

The spelling of 21220220110122 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-two".