100000122222 has 128 divisors (see below), whose sum is σ = 275790025728. Its totient is φ = 23328000000.

The previous prime is 100000122217. The next prime is 100000122239. The reversal of 100000122222 is 222221000001.

It is a junction number, because it is equal to n+sod(n) for n = 100000122198 and 100000122207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2779 + ... + 447222.

It is an arithmetic number, because the mean of its divisors is an integer number (2154609576).

Almost surely, 2^100000122222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100000122222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137895012864).

100000122222 is an abundant number, since it is smaller than the sum of its proper divisors (175789903506).

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

100000122222 is a wasteful number, since it uses less digits than its factorization.

100000122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450074.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 100000122222 its reverse (222221000001), we get a palindrome (322221122223).

It can be divided in two parts, 1000001 and 22222, that multiplied together give a palindrome (22222022222).

The spelling of 100000122222 in words is "one hundred billion, one hundred twenty-two thousand, two hundred twenty-two".