123322212 has 72 divisors (see below), whose sum is σ = 339164280. Its totient is φ = 37555200.

The previous prime is 123322187. The next prime is 123322231. The reversal of 123322212 is 212223321.

It can be written as a sum of positive squares in 4 ways, for example, as 26378496 + 96943716 = 5136^2 + 9846^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45964 + ... + 48572.

It is an arithmetic number, because the mean of its divisors is an integer number (4710615).

Almost surely, 2^123322212 is an apocalyptic number.

123322212 is a gapful number since it is divisible by the number (12) 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 123322212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169582140).

123322212 is an abundant number, since it is smaller than the sum of its proper divisors (215842068).

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

123322212 is a wasteful number, since it uses less digits than its factorization.

123322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733 (or 2728 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 123322212 is about 11105.0534442658. The cubic root of 123322212 is about 497.7528652336.

Adding to 123322212 its reverse (212223321), we get a palindrome (335545533).

The spelling of 123322212 in words is "one hundred twenty-three million, three hundred twenty-two thousand, two hundred twelve".