122555888100 has 216 divisors, whose sum is σ = 415293627840. Its totient is φ = 30124535040.

The previous prime is 122555888027. The next prime is 122555888101. The reversal of 122555888100 is 1888555221.

122555888100 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 558 + 88 + 10 + 0 = 666.

It is a super-2 number, since 2×122555888100² (a number of 23 digits) contains 22 as substring.

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 (122555888101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 535849 + ... + 729551.

Almost surely, 2^122555888100 is an apocalyptic number.

122555888100 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 122555888100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207646813920).

122555888100 is an abundant number, since it is smaller than the sum of its proper divisors (292737739740).

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

122555888100 is a wasteful number, since it uses less digits than its factorization.

122555888100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193779 (or 193769 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

The spelling of 122555888100 in words is "one hundred twenty-two billion, five hundred fifty-five million, eight hundred eighty-eight thousand, one hundred".