99018421125120 has 1200 divisors, whose sum is σ = 429569393299200. Its totient is φ = 21301271986176.

The previous prime is 99018421125083. The next prime is 99018421125131. The reversal of 99018421125120 is 2152112481099.

99018421125120 is a `hidden beast` number, since 9 + 9 + 0 + 18 + 4 + 2 + 112 + 512 + 0 = 666.

It is a super-2 number, since 2×99018421125120² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 789564181 + ... + 789689579.

It is an arithmetic number, because the mean of its divisors is an integer number (357974494416).

Almost surely, 2^{99018421125120} is an apocalyptic number.

99018421125120 is a gapful number since it is divisible by the number (90) 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 99018421125120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214784696649600).

99018421125120 is an abundant number, since it is smaller than the sum of its proper divisors (330550972174080).

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

99018421125120 is a wasteful number, since it uses less digits than its factorization.

99018421125120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125468 (or 125433 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 99018421125120 in words is "ninety-nine trillion, eighteen billion, four hundred twenty-one million, one hundred twenty-five thousand, one hundred twenty".