122222122100 has 144 divisors (see below), whose sum is σ = 297457628160. Its totient is φ = 43284326400.

The previous prime is 122222122097. The next prime is 122222122109. The reversal of 122222122100 is 1221222221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222122109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4540481 + ... + 4567319.

Almost surely, 2^122222122100 is an apocalyptic number.

122222122100 is a gapful number since it is divisible by the number (10) 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 122222122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148728814080).

122222122100 is an abundant number, since it is smaller than the sum of its proper divisors (175235506060).

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

122222122100 is a wasteful number, since it uses less digits than its factorization.

122222122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27010 (or 27003 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122222122100 its reverse (1221222221), we get a palindrome (123443344321).

The spelling of 122222122100 in words is "one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred".