2021222112112 has 80 divisors (see below), whose sum is σ = 4555476288000. Its totient is φ = 850861751040.

The previous prime is 2021222112101. The next prime is 2021222112113. The reversal of 2021222112112 is 2112112221202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021222112112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222112113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666639 + ... + 2611537.

It is an arithmetic number, because the mean of its divisors is an integer number (56943453600).

Almost surely, 2^{2021222112112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021222112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2277738144000).

2021222112112 is an abundant number, since it is smaller than the sum of its proper divisors (2534254175888).

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

2021222112112 is a wasteful number, since it uses less digits than its factorization.

2021222112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945254 (or 945248 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2021222112112 its reverse (2112112221202), we get a palindrome (4133334333314).

The spelling of 2021222112112 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twelve".