1222223446778 has 8 divisors (see below), whose sum is σ = 1839813387168. Its totient is φ = 608952317724.

The previous prime is 1222223446777. The next prime is 1222223446837. The reversal of 1222223446778 is 8776443222221.

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

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222223446777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079702126 + ... + 1079703257.

It is an arithmetic number, because the mean of its divisors is an integer number (229976673396).

Almost surely, 2^{1222223446778} is an apocalyptic number.

1222223446778 is a deficient number, since it is larger than the sum of its proper divisors (617589940390).

1222223446778 is a wasteful number, since it uses less digits than its factorization.

1222223446778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159405668.

The product of its digits is 3612672, while the sum is 50.

Adding to 1222223446778 its reverse (8776443222221), we get a palindrome (9998666668999).

The spelling of 1222223446778 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-three million, four hundred forty-six thousand, seven hundred seventy-eight".