222011322221 has 4 divisors (see below), whose sum is σ = 239089116252. Its totient is φ = 204933528192.

The previous prime is 222011322199. The next prime is 222011322229. The reversal of 222011322221 is 122223110222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93872380996 + 128138941225 = 306386^2 + 357965^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011322221 - 2²² = 222007127917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222011322193 and 222011322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222011322229) 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, 8538896996 + ... + 8538897021.

It is an arithmetic number, because the mean of its divisors is an integer number (59772279063).

Almost surely, 2^222011322221 is an apocalyptic number.

It is an amenable number.

222011322221 is a deficient number, since it is larger than the sum of its proper divisors (17077794031).

222011322221 is a wasteful number, since it uses less digits than its factorization.

222011322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17077794030.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222011322221 its reverse (122223110222), we get a palindrome (344234432443).

The spelling of 222011322221 in words is "two hundred twenty-two billion, eleven million, three hundred twenty-two thousand, two hundred twenty-one".