222258121 has 2 divisors, whose sum is σ = 222258122. Its totient is φ = 222258120.

The previous prime is 222258103. The next prime is 222258139. The reversal of 222258121 is 121852222.

It is a balanced prime because it is at equal distance from previous prime (222258103) and next prime (222258139).

It can be written as a sum of positive squares in only one way, i.e., 204919225 + 17338896 = 14315^2 + 4164^2 .

It is a cyclic number.

It is not a de Polignac number, because 222258121 - 2¹⁹ = 221733833 is a prime.

It is not a weakly prime, because it can be changed into another prime (222258151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111129060 + 111129061.

It is an arithmetic number, because the mean of its divisors is an integer number (111129061).

Almost surely, 2^222258121 is an apocalyptic number.

It is an amenable number.

222258121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222258121 is an equidigital number, since it uses as much as digits as its factorization.

222258121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 25.

The square root of 222258121 is about 14908.3238829856. The cubic root of 222258121 is about 605.7394787254.

The spelling of 222258121 in words is "two hundred twenty-two million, two hundred fifty-eight thousand, one hundred twenty-one".