1222345667778 has 8 divisors (see below), whose sum is σ = 2444691335568. Its totient is φ = 407448555924.

The previous prime is 1222345667597. The next prime is 1222345667801. The reversal of 1222345667778 is 8777665432221.

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

1222345667778 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101862138976 + ... + 101862138987.

It is an arithmetic number, because the mean of its divisors is an integer number (305586416946).

Almost surely, 2^{1222345667778} is an apocalyptic number.

1222345667778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1222345667778 is a wasteful number, since it uses less digits than its factorization.

1222345667778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203724277968.

The product of its digits is 47416320, while the sum is 60.

The spelling of 1222345667778 in words is "one trillion, two hundred twenty-two billion, three hundred forty-five million, six hundred sixty-seven thousand, seven hundred seventy-eight".