222120221121 has 6 divisors (see below), whose sum is σ = 320840319410. Its totient is φ = 148080147408.

The previous prime is 222120221093. The next prime is 222120221131. The reversal of 222120221121 is 121122021222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 141086628225 + 81033592896 = 375615^2 + 284664^2 .

It is not a de Polignac number, because 222120221121 - 2¹¹ = 222120219073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222120221094 and 222120221103.

It is not an unprimeable number, because it can be changed into a prime (222120221131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12340012276 + ... + 12340012293.

Almost surely, 2^222120221121 is an apocalyptic number.

It is an amenable number.

222120221121 is a deficient number, since it is larger than the sum of its proper divisors (98720098289).

222120221121 is a wasteful number, since it uses less digits than its factorization.

222120221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24680024575 (or 24680024572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222120221121 its reverse (121122021222), we get a palindrome (343242242343).

The spelling of 222120221121 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".