1222111 has 8 divisors (see below), whose sum is σ = 1341648. Its totient is φ = 1104000.

The previous prime is 1222097. The next prime is 1222129. The reversal of 1222111 is 1112221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222111 is a prime.

1222111 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222171) 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 in 7 ways as a sum of consecutive naturals, for example, 2421 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (167706).

2^1222111 is an apocalyptic number.

1222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222111 is a deficient number, since it is larger than the sum of its proper divisors (119537).

1222111 is a wasteful number, since it uses less digits than its factorization.

1222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 8, while the sum is 10.

The square root of 1222111 is about 1105.4912934981. The cubic root of 1222111 is about 106.9145677279.

Adding to 1222111 its reverse (1112221), we get a palindrome (2334332).

It can be divided in two parts, 12221 and 11, that multiplied together give a palindrome (134431).

The spelling of 1222111 in words is "one million, two hundred twenty-two thousand, one hundred eleven".