222243121 has 2 divisors, whose sum is σ = 222243122. Its totient is φ = 222243120.

The previous prime is 222243107. The next prime is 222243149. The reversal of 222243121 is 121342222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 92852496 = 11375^2 + 9636^2 .

It is a cyclic number.

It is not a de Polignac number, because 222243121 - 2¹¹ = 222241073 is a prime.

It is not a weakly prime, because it can be changed into another prime (222243101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111121560 + 111121561.

It is an arithmetic number, because the mean of its divisors is an integer number (111121561).

Almost surely, 2^222243121 is an apocalyptic number.

It is an amenable number.

222243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222243121 is an equidigital number, since it uses as much as digits as its factorization.

222243121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 222243121 is about 14907.8207998352. The cubic root of 222243121 is about 605.7258514819.

Adding to 222243121 its reverse (121342222), we get a palindrome (343585343).

The spelling of 222243121 in words is "two hundred twenty-two million, two hundred forty-three thousand, one hundred twenty-one".