222201121 has 2 divisors, whose sum is σ = 222201122. Its totient is φ = 222201120.

The previous prime is 222201097. The next prime is 222201127. The reversal of 222201121 is 121102222.

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., 210395025 + 11806096 = 14505^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201121 - 2¹⁷ = 222070049 is a prime.

It is not a weakly prime, because it can be changed into another prime (222201127) 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, 111100560 + 111100561.

It is an arithmetic number, because the mean of its divisors is an integer number (111100561).

Almost surely, 2^222201121 is an apocalyptic number.

It is an amenable number.

222201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222201121 is an equidigital number, since it uses as much as digits as its factorization.

222201121 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 222201121 is about 14906.4120766870. The cubic root of 222201121 is about 605.6876919378.

Adding to 222201121 its reverse (121102222), we get a palindrome (343303343).

The spelling of 222201121 in words is "two hundred twenty-two million, two hundred one thousand, one hundred twenty-one".