22222112220021 has 8 divisors (see below), whose sum is σ = 33862266240064. Its totient is φ = 12698349840000.

The previous prime is 22222112219999. The next prime is 22222112220059. The reversal of 22222112220021 is 12002221122222.

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

It is not a de Polignac number, because 22222112220021 - 2¹³ = 22222112211829 is a prime.

It is a super-3 number, since 3×22222112220021³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1058195820001 = 22222112220021 / (2 + 2 + 2 + 2 + 2 + 1 + 1 + 2 + 2 + 2 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222112220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222112260021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529097909980 + ... + 529097910021.

It is an arithmetic number, because the mean of its divisors is an integer number (4232783280008).

Almost surely, 2^{22222112220021} is an apocalyptic number.

22222112220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22222112220021 is a deficient number, since it is larger than the sum of its proper divisors (11640154020043).

22222112220021 is a wasteful number, since it uses less digits than its factorization.

22222112220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058195820011.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22222112220021 its reverse (12002221122222), we get a palindrome (34224333342243).

The spelling of 22222112220021 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twenty thousand, twenty-one".