2021011222220 has 96 divisors (see below), whose sum is σ = 4441633007616. Its totient is φ = 770992992000.

The previous prime is 2021011222159. The next prime is 2021011222247. The reversal of 2021011222220 is 222221101202.

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, 261547997 + ... + 261555723.

It is an arithmetic number, because the mean of its divisors is an integer number (46267010496).

Almost surely, 2^{2021011222220} is an apocalyptic number.

2021011222220 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 2021011222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220816503808).

2021011222220 is an abundant number, since it is smaller than the sum of its proper divisors (2420621785396).

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

2021011222220 is a wasteful number, since it uses less digits than its factorization.

2021011222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9351 (or 9349 counting only the distinct ones).

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

Adding to 2021011222220 its reverse (222221101202), we get a palindrome (2243232323422).

The spelling of 2021011222220 in words is "two trillion, twenty-one billion, eleven million, two hundred twenty-two thousand, two hundred twenty".