203111200100 has 18 divisors (see below), whose sum is σ = 440751304434. Its totient is φ = 81244480000.

The previous prime is 203111200099. The next prime is 203111200129. The reversal of 203111200100 is 1002111302.

It can be written as a sum of positive squares in 3 ways, for example, as 1192182784 + 201919017316 = 34528^2 + 449354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1015555901 + ... + 1015556100.

Almost surely, 2^203111200100 is an apocalyptic number.

203111200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203111200100 is an abundant number, since it is smaller than the sum of its proper divisors (237640104334).

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

203111200100 is a wasteful number, since it uses less digits than its factorization.

203111200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031112015 (or 2031112008 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 203111200100 its reverse (1002111302), we get a palindrome (204113311402).

The spelling of 203111200100 in words is "two hundred three billion, one hundred eleven million, two hundred thousand, one hundred".