222102121 has 2 divisors, whose sum is σ = 222102122. Its totient is φ = 222102120.

The previous prime is 222102031. The next prime is 222102149. The reversal of 222102121 is 121201222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200618896 + 21483225 = 14164^2 + 4635^2 .

It is a cyclic number.

It is not a de Polignac number, because 222102121 - 2¹⁹ = 221577833 is a prime.

It is not a weakly prime, because it can be changed into another prime (222106121) 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 as a sum of consecutive naturals, namely, 111051060 + 111051061.

It is an arithmetic number, because the mean of its divisors is an integer number (111051061).

Almost surely, 2^222102121 is an apocalyptic number.

It is an amenable number.

222102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222102121 is an equidigital number, since it uses as much as digits as its factorization.

222102121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 222102121 is about 14903.0909881138. The cubic root of 222102121 is about 605.5977254114.

Adding to 222102121 its reverse (121201222), we get a palindrome (343303343).

The spelling of 222102121 in words is "two hundred twenty-two million, one hundred two thousand, one hundred twenty-one".