222211202121 has 8 divisors (see below), whose sum is σ = 329201780960. Its totient is φ = 148140801396.

The previous prime is 222211202107. The next prime is 222211202141. The reversal of 222211202121 is 121202112222.

It is a happy number.

222211202121 is a `hidden beast` number, since 222 + 211 + 20 + 212 + 1 = 666.

It is not a de Polignac number, because 222211202121 - 2¹⁹ = 222210677833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222211202094 and 222211202103.

It is not an unprimeable number, because it can be changed into a prime (222211202141) 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, 4115022235 + ... + 4115022288.

It is an arithmetic number, because the mean of its divisors is an integer number (41150222620).

Almost surely, 2^222211202121 is an apocalyptic number.

It is an amenable number.

222211202121 is a deficient number, since it is larger than the sum of its proper divisors (106990578839).

222211202121 is an equidigital number, since it uses as much as digits as its factorization.

222211202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230044532 (or 8230044526 counting only the distinct ones).

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

Adding to 222211202121 its reverse (121202112222), we get a palindrome (343413314343).

The spelling of 222211202121 in words is "two hundred twenty-two billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".