123221221222 has 32 divisors (see below), whose sum is σ = 202336318080. Its totient is φ = 55814935680.

The previous prime is 123221221141. The next prime is 123221221243. The reversal of 123221221222 is 222122122321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 123221221193 and 123221221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22736029 + ... + 22741447.

It is an arithmetic number, because the mean of its divisors is an integer number (6323009940).

Almost surely, 2^123221221222 is an apocalyptic number.

123221221222 is a deficient number, since it is larger than the sum of its proper divisors (79115096858).

123221221222 is a wasteful number, since it uses less digits than its factorization.

123221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836.

The product of its digits is 768, while the sum is 22.

Adding to 123221221222 its reverse (222122122321), we get a palindrome (345343343543).

It can be divided in two parts, 123221 and 221222, that added together give a palindrome (344443).

The spelling of 123221221222 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".