2222221020 has 96 divisors (see below), whose sum is σ = 6322713600. Its totient is φ = 583075584.

The previous prime is 2222221009. The next prime is 2222221063. The reversal of 2222221020 is 201222222.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1795842 + ... + 1797078.

It is an arithmetic number, because the mean of its divisors is an integer number (65861600).

Almost surely, 2^2222221020 is an apocalyptic number.

2222221020 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 2222221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3161356800).

2222221020 is an abundant number, since it is smaller than the sum of its proper divisors (4100492580).

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

2222221020 is a wasteful number, since it uses less digits than its factorization.

2222221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1705 counting only the distinct ones).

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

The square root of 2222221020 is about 47140.4393276092. The cubic root of 2222221020 is about 1304.9556450625.

Adding to 2222221020 its reverse (201222222), we get a palindrome (2423443242).

The spelling of 2222221020 in words is "two billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty".