2112120220 has 48 divisors (see below), whose sum is σ = 5071772160. Its totient is φ = 723772224.

The previous prime is 2112120191. The next prime is 2112120223. The reversal of 2112120220 is 220212112.

It is a happy number.

It is a super-2 number, since 2×2112120220² = 8922103647465696800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112120223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426921 + ... + 431839.

It is an arithmetic number, because the mean of its divisors is an integer number (105661920).

Almost surely, 2^2112120220 is an apocalyptic number.

2112120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112120220 is an abundant number, since it is smaller than the sum of its proper divisors (2959651940).

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

2112120220 is a wasteful number, since it uses less digits than its factorization.

2112120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2112120220 is about 45957.8091296789. The cubic root of 2112120220 is about 1283.0380755880.

Adding to 2112120220 its reverse (220212112), we get a palindrome (2332332332).

The spelling of 2112120220 in words is "two billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty".