100999800000 has 504 divisors, whose sum is σ = 394821698544. Its totient is φ = 24480000000.

The previous prime is 100999799983. The next prime is 100999800001. The reversal of 100999800000 is 8999001.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (100999800001) 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, 19797450 + ... + 19802550.

It is an arithmetic number, because the mean of its divisors is an integer number (783376386).

Almost surely, 2^100999800000 is an apocalyptic number.

100999800000 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 100999800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197410849272).

100999800000 is an abundant number, since it is smaller than the sum of its proper divisors (293821898544).

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

100999800000 is an equidigital number, since it uses as much as digits as its factorization.

100999800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 100999800000 in words is "one hundred billion, nine hundred ninety-nine million, eight hundred thousand".