222001211 has 4 divisors (see below), whose sum is σ = 222253512. Its totient is φ = 221748912.

The previous prime is 222001201. The next prime is 222001223. The reversal of 222001211 is 112100222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222001211 - 2²⁶ = 154892347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222001192 and 222001201.

It is not an unprimeable number, because it can be changed into a prime (222001201) 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 in 3 ways as a sum of consecutive naturals, for example, 124826 + ... + 126591.

It is an arithmetic number, because the mean of its divisors is an integer number (55563378).

Almost surely, 2^222001211 is an apocalyptic number.

222001211 is a deficient number, since it is larger than the sum of its proper divisors (252301).

222001211 is an equidigital number, since it uses as much as digits as its factorization.

222001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252300.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 222001211 is about 14899.7050641951. The cubic root of 222001211 is about 605.5059956498.

Adding to 222001211 its reverse (112100222), we get a palindrome (334101433).

The spelling of 222001211 in words is "two hundred twenty-two million, one thousand, two hundred eleven".