122222202312 has 128 divisors (see below), whose sum is σ = 354249768960. Its totient is φ = 34416990720.

The previous prime is 122222202307. The next prime is 122222202353. The reversal of 122222202312 is 213202222221.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 31 ways as a sum of consecutive naturals, for example, 22207353 + ... + 22212855.

It is an arithmetic number, because the mean of its divisors is an integer number (2767576320).

Almost surely, 2^122222202312 is an apocalyptic number.

122222202312 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 122222202312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177124884480).

122222202312 is an abundant number, since it is smaller than the sum of its proper divisors (232027566648).

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

122222202312 is a wasteful number, since it uses less digits than its factorization.

122222202312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403 (or 7399 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 122222202312 its reverse (213202222221), we get a palindrome (335424424533).

The spelling of 122222202312 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred two thousand, three hundred twelve".