201100335500 has 96 divisors (see below), whose sum is σ = 465288183360. Its totient is φ = 75667737600.

The previous prime is 201100335479. The next prime is 201100335529. The reversal of 201100335500 is 5533001102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19281287 + ... + 19291713.

It is an arithmetic number, because the mean of its divisors is an integer number (4846751910).

Almost surely, 2^201100335500 is an apocalyptic number.

201100335500 is a gapful number since it is divisible by the number (20) 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 201100335500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232644091680).

201100335500 is an abundant number, since it is smaller than the sum of its proper divisors (264187847860).

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

201100335500 is a wasteful number, since it uses less digits than its factorization.

201100335500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12732 (or 12720 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 201100335500 its reverse (5533001102), we get a palindrome (206633336602).

The spelling of 201100335500 in words is "two hundred one billion, one hundred million, three hundred thirty-five thousand, five hundred".