2112221000 has 64 divisors (see below), whose sum is σ = 4990826880. Its totient is φ = 836644800.

The previous prime is 2112220987. The next prime is 2112221011. The reversal of 2112221000 is 1222112.

It is a happy number.

It is a super-2 number, since 2×2112221000² = 8922955105682000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92747 + ... + 113253.

It is an arithmetic number, because the mean of its divisors is an integer number (77981670).

Almost surely, 2^2112221000 is an apocalyptic number.

2112221000 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 2112221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495413440).

2112221000 is an abundant number, since it is smaller than the sum of its proper divisors (2878605880).

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

2112221000 is a wasteful number, since it uses less digits than its factorization.

2112221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20631 (or 20617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2112221000 is about 45958.9055570300. The cubic root of 2112221000 is about 1283.0584820213.

Adding to 2112221000 its reverse (1222112), we get a palindrome (2113443112).

The spelling of 2112221000 in words is "two billion, one hundred twelve million, two hundred twenty-one thousand".