22012222112221 has 8 divisors (see below), whose sum is σ = 24014157263424. Its totient is φ = 20010424302720.

The previous prime is 22012222112207. The next prime is 22012222112267. The reversal of 22012222112221 is 12221122221022.

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

It is a cyclic number.

It is not a de Polignac number, because 22012222112221 - 2⁹ = 22012222111709 is a prime.

It is a super-2 number, since 2×22012222112221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012222112192 and 22012222112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012222112201) 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, 34000161 + ... + 34641526.

It is an arithmetic number, because the mean of its divisors is an integer number (3001769657928).

Almost surely, 2^{22012222112221} is an apocalyptic number.

It is an amenable number.

22012222112221 is a deficient number, since it is larger than the sum of its proper divisors (2001935151203).

22012222112221 is a wasteful number, since it uses less digits than its factorization.

22012222112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68670851.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22012222112221 its reverse (12221122221022), we get a palindrome (34233344333243).

The spelling of 22012222112221 in words is "twenty-two trillion, twelve billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".