20210220222100 has 72 divisors (see below), whose sum is σ = 44206028633088. Its totient is φ = 8019612518400.

The previous prime is 20210220222013. The next prime is 20210220222113. The reversal of 20210220222100 is 122202201202.

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 23 ways as a sum of consecutive naturals, for example, 132422835 + ... + 132575365.

It is an arithmetic number, because the mean of its divisors is an integer number (613972619904).

Almost surely, 2^{20210220222100} is an apocalyptic number.

20210220222100 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 20210220222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22103014316544).

20210220222100 is an abundant number, since it is smaller than the sum of its proper divisors (23995808410988).

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

20210220222100 is a wasteful number, since it uses less digits than its factorization.

20210220222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163105 (or 163098 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20210220222100 its reverse (122202201202), we get a palindrome (20332422423302).

The spelling of 20210220222100 in words is "twenty trillion, two hundred ten billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".