22212022220221 has 8 divisors (see below), whose sum is σ = 22415907337560. Its totient is φ = 22008139013952.

The previous prime is 22212022220183. The next prime is 22212022220257. The reversal of 22212022220221 is 12202222021222.

It can be written as a sum of positive squares in 4 ways, for example, as 913926440025 + 21298095780196 = 955995^2 + 4614986^2 .

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 22212022220221 - 2¹⁹ = 22212021695933 is a prime.

It is a super-2 number, since 2×22212022220221² (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 = 22212022220192 and 22212022220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212022220281) 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, 34717011 + ... + 35351023.

It is an arithmetic number, because the mean of its divisors is an integer number (2801988417195).

Almost surely, 2^{22212022220221} is an apocalyptic number.

It is an amenable number.

22212022220221 is a deficient number, since it is larger than the sum of its proper divisors (203885117339).

22212022220221 is a wasteful number, since it uses less digits than its factorization.

22212022220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955535.

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

Adding to 22212022220221 its reverse (12202222021222), we get a palindrome (34414244241443).

The spelling of 22212022220221 in words is "twenty-two trillion, two hundred twelve billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".