1222211 has 4 divisors (see below), whose sum is σ = 1224552. Its totient is φ = 1219872.

The previous prime is 1222187. The next prime is 1222219. The reversal of 1222211 is 1122221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222192 and 1222201.

It is not an unprimeable number, because it can be changed into a prime (1222219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (306138).

2^1222211 is an apocalyptic number.

1222211 is a deficient number, since it is larger than the sum of its proper divisors (2341).

1222211 is an equidigital number, since it uses as much as digits as its factorization.

1222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

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

The square root of 1222211 is about 1105.5365213325. The cubic root of 1222211 is about 106.9174837656.

Adding to 1222211 its reverse (1122221), we get a palindrome (2344432).

The spelling of 1222211 in words is "one million, two hundred twenty-two thousand, two hundred eleven".