1222221222218 has 8 divisors (see below), whose sum is σ = 1833339166848. Its totient is φ = 611108166604.

The previous prime is 1222221222217. The next prime is 1222221222253. The reversal of 1222221222218 is 8122221222221.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1222221222217) 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, 515546 + ... + 1646277.

It is an arithmetic number, because the mean of its divisors is an integer number (229167395856).

Almost surely, 2^{1222221222218} is an apocalyptic number.

1222221222218 is a deficient number, since it is larger than the sum of its proper divisors (611117944630).

1222221222218 is a wasteful number, since it uses less digits than its factorization.

1222221222218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444508.

The product of its digits is 4096, while the sum is 29.

Adding to 1222221222218 its reverse (8122221222221), we get a palindrome (9344442444439).

The spelling of 1222221222218 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eighteen".