122222321312 has 144 divisors (see below), whose sum is σ = 306554764320. Its totient is φ = 47531699712.

The previous prime is 122222321303. The next prime is 122222321323. The reversal of 122222321312 is 213123222221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1151843 + ... + 1253469.

It is an arithmetic number, because the mean of its divisors is an integer number (2128852530).

Almost surely, 2^122222321312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122222321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153277382160).

122222321312 is an abundant number, since it is smaller than the sum of its proper divisors (184332443008).

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

122222321312 is a wasteful number, since it uses less digits than its factorization.

122222321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101723 (or 101708 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 122222321312 its reverse (213123222221), we get a palindrome (335345543533).

Subtracting 122222321312 from its reverse (213123222221), we obtain a palindrome (90900900909).

The spelling of 122222321312 in words is "one hundred twenty-two billion, two hundred twenty-two million, three hundred twenty-one thousand, three hundred twelve".