21112221212022 has 8 divisors (see below), whose sum is σ = 42224442424056. Its totient is φ = 7037407070672.

The previous prime is 21112221211981. The next prime is 21112221212051. The reversal of 21112221212022 is 22021212221112.

It is a sphenic number, since it is the product of 3 distinct primes.

21112221212022 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112221212022.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1759351767663 + ... + 1759351767674.

It is an arithmetic number, because the mean of its divisors is an integer number (5278055303007).

Almost surely, 2^{21112221212022} is an apocalyptic number.

21112221212022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21112221212022 is a wasteful number, since it uses less digits than its factorization.

21112221212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518703535342.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21112221212022 its reverse (22021212221112), we get a palindrome (43133433433134).

The spelling of 21112221212022 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, twenty-two".