1222127678 has 16 divisors (see below), whose sum is σ = 1930780800. Its totient is φ = 579030936.

The previous prime is 1222127677. The next prime is 1222127707. The reversal of 1222127678 is 8767212221.

It is a super-2 number, since 2×1222127678² = 2987192122667343368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222127677) 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, 119228 + ... + 129071.

It is an arithmetic number, because the mean of its divisors is an integer number (120673800).

Almost surely, 2^1222127678 is an apocalyptic number.

1222127678 is a deficient number, since it is larger than the sum of its proper divisors (708653122).

1222127678 is a wasteful number, since it uses less digits than its factorization.

1222127678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248431.

The product of its digits is 37632, while the sum is 38.

The square root of 1222127678 is about 34958.9427471713. The cubic root of 1222127678 is about 1069.1505407570.

Adding to 1222127678 its reverse (8767212221), we get a palindrome (9989339899).

The spelling of 1222127678 in words is "one billion, two hundred twenty-two million, one hundred twenty-seven thousand, six hundred seventy-eight".