122221678 has 8 divisors (see below), whose sum is σ = 191303568. Its totient is φ = 58453824.

The previous prime is 122221639. The next prime is 122221679. The reversal of 122221678 is 876122221.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328451 + ... + 1328542.

It is an arithmetic number, because the mean of its divisors is an integer number (23912946).

Almost surely, 2^122221678 is an apocalyptic number.

122221678 is a deficient number, since it is larger than the sum of its proper divisors (69081890).

122221678 is a wasteful number, since it uses less digits than its factorization.

122221678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657018.

The product of its digits is 5376, while the sum is 31.

The square root of 122221678 is about 11055.3913544478. The cubic root of 122221678 is about 496.2677810674.

Adding to 122221678 its reverse (876122221), we get a palindrome (998343899).

The spelling of 122221678 in words is "one hundred twenty-two million, two hundred twenty-one thousand, six hundred seventy-eight".