122222278 has 8 divisors (see below), whose sum is σ = 187234272. Its totient is φ = 59810856.

The previous prime is 122222267. The next prime is 122222279. The reversal of 122222278 is 872222221.

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

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222279) 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, 650025 + ... + 650212.

It is an arithmetic number, because the mean of its divisors is an integer number (23404284).

Almost surely, 2^122222278 is an apocalyptic number.

122222278 is a deficient number, since it is larger than the sum of its proper divisors (65011994).

122222278 is a wasteful number, since it uses less digits than its factorization.

122222278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300286.

The product of its digits is 3584, while the sum is 28.

The square root of 122222278 is about 11055.4184904960. The cubic root of 122222278 is about 496.2685931442.

Adding to 122222278 its reverse (872222221), we get a palindrome (994444499).

It can be divided in two parts, 122222 and 278, that added together give a square (122500 = 350²).

The spelling of 122222278 in words is "one hundred twenty-two million, two hundred twenty-two thousand, two hundred seventy-eight".