203023211100 has 72 divisors (see below), whose sum is σ = 589106961408. Its totient is φ = 53983473600.

The previous prime is 203023211023. The next prime is 203023211119. The reversal of 203023211100 is 1112320302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 203023211100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871036 + ... + 1079235.

Almost surely, 2^203023211100 is an apocalyptic number.

203023211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203023211100 is an abundant number, since it is smaller than the sum of its proper divisors (386083750308).

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

203023211100 is a wasteful number, since it uses less digits than its factorization.

203023211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950635 (or 1950628 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 203023211100 its reverse (1112320302), we get a palindrome (204135531402).

The spelling of 203023211100 in words is "two hundred three billion, twenty-three million, two hundred eleven thousand, one hundred".