22021001222112 has 384 divisors, whose sum is σ = 70806713241600. Its totient is φ = 6634834956288.

The previous prime is 22021001222111. The next prime is 22021001222149. The reversal of 22021001222112 is 21122210012022.

It is a happy number.

22021001222112 is a `hidden beast` number, since 220 + 210 + 0 + 1 + 2 + 221 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021001222111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26679028 + ... + 27492044.

It is an arithmetic number, because the mean of its divisors is an integer number (184392482400).

Almost surely, 2^{22021001222112} 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 22021001222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35403356620800).

22021001222112 is an abundant number, since it is smaller than the sum of its proper divisors (48785712019488).

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

22021001222112 is a wasteful number, since it uses less digits than its factorization.

22021001222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813135 (or 813121 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021001222112 its reverse (21122210012022), we get a palindrome (43143211234134).

The spelling of 22021001222112 in words is "twenty-two trillion, twenty-one billion, one million, two hundred twenty-two thousand, one hundred twelve".