123222220 has 96 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 41356800.

The previous prime is 123222217. The next prime is 123222223. The reversal of 123222220 is 22222321.

It is an interprime number because it is at equal distance from previous prime (123222217) and next prime (123222223).

It is a junction number, because it is equal to n+sod(n) for n = 123222194 and 123222203.

It is not an unprimeable number, because it can be changed into a prime (123222223) 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 31 ways as a sum of consecutive naturals, for example, 171021 + ... + 171739.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^123222220 is an apocalyptic number.

123222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

123222220 is an abundant number, since it is smaller than the sum of its proper divisors (181596980).

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

123222220 is a wasteful number, since it uses less digits than its factorization.

123222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 123222220 is about 11100.5504368027. The cubic root of 123222220 is about 497.6182996875.

Adding to 123222220 its reverse (22222321), we get a palindrome (145444541).

The spelling of 123222220 in words is "one hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty".