222202121 has 16 divisors (see below), whose sum is σ = 239708160. Its totient is φ = 205228800.

The previous prime is 222202111. The next prime is 222202133. The reversal of 222202121 is 121202222.

It is a cyclic number.

It is not a de Polignac number, because 222202121 - 2¹⁰ = 222201097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222202096 and 222202105.

It is not an unprimeable number, because it can be changed into a prime (222202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217550 + ... + 218568.

It is an arithmetic number, because the mean of its divisors is an integer number (14981760).

Almost surely, 2^222202121 is an apocalyptic number.

It is an amenable number.

222202121 is a deficient number, since it is larger than the sum of its proper divisors (17506039).

222202121 is a wasteful number, since it uses less digits than its factorization.

222202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222202121 is about 14906.4456192615. The cubic root of 222202121 is about 605.6886005543.

Adding to 222202121 its reverse (121202222), we get a palindrome (343404343).

The spelling of 222202121 in words is "two hundred twenty-two million, two hundred two thousand, one hundred twenty-one".