203111100104 has 128 divisors (see below), whose sum is σ = 435010867200. Its totient is φ = 88090986240.

The previous prime is 203111100097. The next prime is 203111100109. The reversal of 203111100104 is 401001111302.

It is not an unprimeable number, because it can be changed into a prime (203111100109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37561769 + ... + 37567175.

It is an arithmetic number, because the mean of its divisors is an integer number (3398522400).

Almost surely, 2^203111100104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203111100104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217505433600).

203111100104 is an abundant number, since it is smaller than the sum of its proper divisors (231899767096).

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

203111100104 is a wasteful number, since it uses less digits than its factorization.

203111100104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 203111100104 its reverse (401001111302), we get a palindrome (604112211406).

The spelling of 203111100104 in words is "two hundred three billion, one hundred eleven million, one hundred thousand, one hundred four".