203113100100 has 144 divisors (see below), whose sum is σ = 595743814400. Its totient is φ = 53421189120.

The previous prime is 203113100077. The next prime is 203113100117. The reversal of 203113100100 is 1001311302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25331292 + ... + 25339308.

Almost surely, 2^203113100100 is an apocalyptic number.

203113100100 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 203113100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297871907200).

203113100100 is an abundant number, since it is smaller than the sum of its proper divisors (392630714300).

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

203113100100 is a wasteful number, since it uses less digits than its factorization.

203113100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182 (or 9175 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 203113100100 its reverse (1001311302), we get a palindrome (204114411402).

The spelling of 203113100100 in words is "two hundred three billion, one hundred thirteen million, one hundred thousand, one hundred".