2112222120 has 64 divisors (see below), whose sum is σ = 6709417920. Its totient is φ = 530125824.

The previous prime is 2112222113. The next prime is 2112222127. The reversal of 2112222120 is 212222112.

It is an interprime number because it is at equal distance from previous prime (2112222113) and next prime (2112222127).

It is a super-2 number, since 2×2112222120² = 8922964568434588800, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2112222120.

It is not an unprimeable number, because it can be changed into a prime (2112222127) 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, 515662 + ... + 519741.

It is an arithmetic number, because the mean of its divisors is an integer number (104834655).

Almost surely, 2^2112222120 is an apocalyptic number.

2112222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112222120 is an abundant number, since it is smaller than the sum of its proper divisors (4597195800).

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

2112222120 is a wasteful number, since it uses less digits than its factorization.

2112222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035434 (or 1035430 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2112222120 is about 45958.9177418268. The cubic root of 2112222120 is about 1283.0587088008.

Adding to 2112222120 its reverse (212222112), we get a palindrome (2324444232).

The spelling of 2112222120 in words is "two billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty".