22122220220221 has 4 divisors (see below), whose sum is σ = 24133331149344. Its totient is φ = 20111109291100.

The previous prime is 22122220220183. The next prime is 22122220220291. The reversal of 22122220220221 is 12202202222122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22122220220221 - 2²¹ = 22122218123069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22122220220192 and 22122220220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122220220291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005555464545 + ... + 1005555464566.

It is an arithmetic number, because the mean of its divisors is an integer number (6033332787336).

Almost surely, 2^{22122220220221} is an apocalyptic number.

It is an amenable number.

22122220220221 is a deficient number, since it is larger than the sum of its proper divisors (2011110929123).

22122220220221 is a wasteful number, since it uses less digits than its factorization.

22122220220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011110929122.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22122220220221 its reverse (12202202222122), we get a palindrome (34324422442343).

The spelling of 22122220220221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-one".