2112223220 has 12 divisors (see below), whose sum is σ = 4435668804. Its totient is φ = 844889280.

The previous prime is 2112223177. The next prime is 2112223231. The reversal of 2112223220 is 223222112.

It can be written as a sum of positive squares in 2 ways, for example, as 235254244 + 1876968976 = 15338^2 + 43324^2 .

It is a super-3 number, since 3×2112223220³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 52805561 + ... + 52805600.

It is an arithmetic number, because the mean of its divisors is an integer number (369639067).

Almost surely, 2^2112223220 is an apocalyptic number.

2112223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112223220 is an abundant number, since it is smaller than the sum of its proper divisors (2323445584).

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

2112223220 is a wasteful number, since it uses less digits than its factorization.

2112223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105611170 (or 105611168 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2112223220 is about 45958.9297090348. The cubic root of 2112223220 is about 1283.0589315305.

Adding to 2112223220 its reverse (223222112), we get a palindrome (2335445332).

The spelling of 2112223220 in words is "two billion, one hundred twelve million, two hundred twenty-three thousand, two hundred twenty".