2112232220 has 72 divisors (see below), whose sum is σ = 5189138640. Its totient is φ = 720088320.

The previous prime is 2112232189. The next prime is 2112232229. The reversal of 2112232220 is 222322112.

It is a super-2 number, since 2×2112232220² = 8923049902412256800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112232229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169400 + ... + 181440.

It is an arithmetic number, because the mean of its divisors is an integer number (72071370).

Almost surely, 2^2112232220 is an apocalyptic number.

2112232220 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 2112232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594569320).

2112232220 is an abundant number, since it is smaller than the sum of its proper divisors (3076906420).

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

2112232220 is a wasteful number, since it uses less digits than its factorization.

2112232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12243 (or 12234 counting only the distinct ones).

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

The square root of 2112232220 is about 45959.0276224378. The cubic root of 2112232220 is about 1283.0607538622.

Adding to 2112232220 its reverse (222322112), we get a palindrome (2334554332).

The spelling of 2112232220 in words is "two billion, one hundred twelve million, two hundred thirty-two thousand, two hundred twenty".