2021220222 has 64 divisors (see below), whose sum is σ = 4725540864. Its totient is φ = 564426720.

The previous prime is 2021220211. The next prime is 2021220239. The reversal of 2021220222 is 2220221202.

It is a congruent 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, 365893 + ... + 371375.

It is an arithmetic number, because the mean of its divisors is an integer number (73836576).

Almost surely, 2^2021220222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2362770432).

2021220222 is an abundant number, since it is smaller than the sum of its proper divisors (2704320642).

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

2021220222 is a wasteful number, since it uses less digits than its factorization.

2021220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2021220222 is about 44957.9828506573. The cubic root of 2021220222 is about 1264.3613500976.

Adding to 2021220222 its reverse (2220221202), we get a palindrome (4241441424).

The spelling of 2021220222 in words is "two billion, twenty-one million, two hundred twenty thousand, two hundred twenty-two".