20021122220000 has 720 divisors, whose sum is σ = 55145494293120. Its totient is φ = 7146437760000.

The previous prime is 20021122219997. The next prime is 20021122220023. The reversal of 20021122220000 is 2222112002.

It is a congruent number.

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 119 ways as a sum of consecutive naturals, for example, 52826179811 + ... + 52826180189.

It is an arithmetic number, because the mean of its divisors is an integer number (76590964296).

Almost surely, 2^{20021122220000} is an apocalyptic number.

20021122220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27572747146560).

20021122220000 is an abundant number, since it is smaller than the sum of its proper divisors (35124372073120).

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

20021122220000 is a wasteful number, since it uses less digits than its factorization.

20021122220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021122220000 its reverse (2222112002), we get a palindrome (20023344332002).

The spelling of 20021122220000 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty thousand".