12222345678 has 16 divisors (see below), whose sum is σ = 24445801296. Its totient is φ = 4073930240.

The previous prime is 12222345637. The next prime is 12222345683. The reversal of 12222345678 is 87654322221.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188800 + ... + 245132.

It is an arithmetic number, because the mean of its divisors is an integer number (1527862581).

Almost surely, 2^12222345678 is an apocalyptic number.

12222345678 is an abundant number, since it is smaller than the sum of its proper divisors (12223455618).

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

12222345678 is a wasteful number, since it uses less digits than its factorization.

12222345678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92499.

The product of its digits is 322560, while the sum is 42.

Adding to 12222345678 its reverse (87654322221), we get a palindrome (99876667899).

The spelling of 12222345678 in words is "twelve billion, two hundred twenty-two million, three hundred forty-five thousand, six hundred seventy-eight".