1222218085806 has 96 divisors (see below), whose sum is σ = 3031256835360. Its totient is φ = 353441968128.

The previous prime is 1222218085799. The next prime is 1222218085807. The reversal of 1222218085806 is 6085808122221.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222218085807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2625691 + ... + 3055926.

It is an arithmetic number, because the mean of its divisors is an integer number (31575592035).

Almost surely, 2^{1222218085806} is an apocalyptic number.

1222218085806 is an abundant number, since it is smaller than the sum of its proper divisors (1809038749554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222218085806 is a wasteful number, since it uses less digits than its factorization.

1222218085806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681698 (or 5681695 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 1222218085806 in words is "one trillion, two hundred twenty-two billion, two hundred eighteen million, eighty-five thousand, eight hundred six".