222535121 has 2 divisors, whose sum is σ = 222535122. Its totient is φ = 222535120.

The previous prime is 222535109. The next prime is 222535123. The reversal of 222535121 is 121535222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 79852096 = 11945^2 + 8936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222535121 is a prime.

It is a Sophie Germain prime.

Together with 222535123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222535123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111267560 + 111267561.

It is an arithmetic number, because the mean of its divisors is an integer number (111267561).

Almost surely, 2^222535121 is an apocalyptic number.

It is an amenable number.

222535121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222535121 is an equidigital number, since it uses as much as digits as its factorization.

222535121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 222535121 is about 14917.6111023180. The cubic root of 222535121 is about 605.9910183582.

The spelling of 222535121 in words is "two hundred twenty-two million, five hundred thirty-five thousand, one hundred twenty-one".