123331221222 has 64 divisors (see below), whose sum is σ = 274406641920. Its totient is φ = 36635414400.

The previous prime is 123331221203. The next prime is 123331221263. The reversal of 123331221222 is 222122133321.

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

It is a junction number, because it is equal to n+sod(n) for n = 123331221192 and 123331221201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4081104 + ... + 4111212.

It is an arithmetic number, because the mean of its divisors is an integer number (4287603780).

Almost surely, 2^123331221222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123331221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137203320960).

123331221222 is an abundant number, since it is smaller than the sum of its proper divisors (151075420698).

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

123331221222 is a wasteful number, since it uses less digits than its factorization.

123331221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31349.

The product of its digits is 1728, while the sum is 24.

Adding to 123331221222 its reverse (222122133321), we get a palindrome (345453354543).

The spelling of 123331221222 in words is "one hundred twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty-two".