20211222210020 has 96 divisors (see below), whose sum is σ = 44733111591168. Its totient is φ = 7655595487232.

The previous prime is 20211222209987. The next prime is 20211222210037. The reversal of 20211222210020 is 2001222211202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44320007 + ... + 44773713.

It is an arithmetic number, because the mean of its divisors is an integer number (465969912408).

Almost surely, 2^{20211222210020} is an apocalyptic number.

20211222210020 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 20211222210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22366555795584).

20211222210020 is an abundant number, since it is smaller than the sum of its proper divisors (24521889381148).

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

20211222210020 is a wasteful number, since it uses less digits than its factorization.

20211222210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454709 (or 454707 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20211222210020 its reverse (2001222211202), we get a palindrome (22212444421222).

The spelling of 20211222210020 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, twenty".