188211880122 has 96 divisors (see below), whose sum is σ = 465445605888. Its totient is φ = 50414321664.

The previous prime is 188211880111. The next prime is 188211880123. The reversal of 188211880122 is 221088112881.

188211880122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (188211880123) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1211223 + ... + 1357749.

It is an arithmetic number, because the mean of its divisors is an integer number (4848391728).

Almost surely, 2^188211880122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188211880122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232722802944).

188211880122 is an abundant number, since it is smaller than the sum of its proper divisors (277233725766).

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

188211880122 is a wasteful number, since it uses less digits than its factorization.

188211880122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146820 (or 146813 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 42.

The spelling of 188211880122 in words is "one hundred eighty-eight billion, two hundred eleven million, eight hundred eighty thousand, one hundred twenty-two".