222202021122121 has 8 divisors (see below), whose sum is σ = 222284428913288. Its totient is φ = 222119628192000.

The previous prime is 222202021122119. The next prime is 222202021122181. The reversal of 222202021122121 is 121221120202222.

It can be written as a sum of positive squares in 4 ways, for example, as 114901012817721 + 107301008304400 = 10719189^2 + 10358620^2 .

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 222202021122121 - 2¹ = 222202021122119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202021122092 and 222202021122101.

It is not an unprimeable number, because it can be changed into a prime (222202021122181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26238991 + ... + 33658411.

It is an arithmetic number, because the mean of its divisors is an integer number (27785553614161).

Almost surely, 2^{222202021122121} is an apocalyptic number.

It is an amenable number.

222202021122121 is a deficient number, since it is larger than the sum of its proper divisors (82407791167).

222202021122121 is an equidigital number, since it uses as much as digits as its factorization.

222202021122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430523.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222202021122121 its reverse (121221120202222), we get a palindrome (343423141324343).

The spelling of 222202021122121 in words is "two hundred twenty-two trillion, two hundred two billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".