2112221000000 has 196 divisors, whose sum is σ = 5290355407584. Its totient is φ = 836644800000.

The previous prime is 2112220999963. The next prime is 2112221000003. The reversal of 2112221000000 is 1222112.

It is a happy number.

It is a super-2 number, since 2×2112221000000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221000003) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 102989747 + ... + 103010253.

Almost surely, 2^{2112221000000} is an apocalyptic number.

2112221000000 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 2112221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645177703792).

2112221000000 is an abundant number, since it is smaller than the sum of its proper divisors (3178134407584).

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

2112221000000 is an frugal number, since it uses more digits than its factorization.

2112221000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20652 (or 20617 counting only the distinct ones).

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

Adding to 2112221000000 its reverse (1222112), we get a palindrome (2112222222112).

The spelling of 2112221000000 in words is "two trillion, one hundred twelve billion, two hundred twenty-one million", and thus it is an aban number.