122091338880 has 640 divisors, whose sum is σ = 501705262080. Its totient is φ = 27715903488.

The previous prime is 122091338827. The next prime is 122091338881. The reversal of 122091338880 is 88833190221.

It is a happy number.

122091338880 is a `hidden beast` number, since 1 + 220 + 91 + 338 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (122091338881) 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 79 ways as a sum of consecutive naturals, for example, 56971089 + ... + 56973231.

It is an arithmetic number, because the mean of its divisors is an integer number (783914472).

Almost surely, 2^122091338880 is an apocalyptic number.

122091338880 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 122091338880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250852631040).

122091338880 is an abundant number, since it is smaller than the sum of its proper divisors (379613923200).

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

122091338880 is a wasteful number, since it uses less digits than its factorization.

122091338880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 122091338880 in words is "one hundred twenty-two billion, ninety-one million, three hundred thirty-eight thousand, eight hundred eighty".