2112222240 has 72 divisors (see below), whose sum is σ = 7207963308. Its totient is φ = 563258880.

The previous prime is 2112222209. The next prime is 2112222251. The reversal of 2112222240 is 422222112.

It can be written as a sum of positive squares in 2 ways, for example, as 2076078096 + 36144144 = 45564^2 + 6012^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×2112222240² = 8922965582301235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731971 + ... + 734850.

Almost surely, 2^2112222240 is an apocalyptic number.

2112222240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112222240 is an abundant number, since it is smaller than the sum of its proper divisors (5095741068).

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

2112222240 is a wasteful number, since it uses less digits than its factorization.

2112222240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466842 (or 1466831 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2112222240 is about 45958.9190473405. The cubic root of 2112222240 is about 1283.0587330985.

Adding to 2112222240 its reverse (422222112), we get a palindrome (2534444352).

The spelling of 2112222240 in words is "two billion, one hundred twelve million, two hundred twenty-two thousand, two hundred forty".