2021221000220 has 36 divisors (see below), whose sum is σ = 4345570572840. Its totient is φ = 789686329824.

The previous prime is 2021221000151. The next prime is 2021221000223. The reversal of 2021221000220 is 220001221202.

It is a junction number, because it is equal to n+sod(n) for n = 2021221000195 and 2021221000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221000223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27291590 + ... + 27365549.

It is an arithmetic number, because the mean of its divisors is an integer number (120710293690).

Almost surely, 2^{2021221000220} is an apocalyptic number.

2021221000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021221000220 is an abundant number, since it is smaller than the sum of its proper divisors (2324349572620).

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

2021221000220 is a wasteful number, since it uses less digits than its factorization.

2021221000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54657234 (or 54657189 counting only the distinct ones).

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

Adding to 2021221000220 its reverse (220001221202), we get a palindrome (2241222221422).

The spelling of 2021221000220 in words is "two trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty", and thus it is an aban number.