203113552012 has 48 divisors (see below), whose sum is σ = 428298976000. Its totient is φ = 82333796544.

The previous prime is 203113552009. The next prime is 203113552091. The reversal of 203113552012 is 210255311302.

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 15 ways as a sum of consecutive naturals, for example, 20914 + ... + 637702.

Almost surely, 2^203113552012 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 203113552012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214149488000).

203113552012 is an abundant number, since it is smaller than the sum of its proper divisors (225185423988).

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

203113552012 is a wasteful number, since it uses less digits than its factorization.

203113552012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617438 (or 617436 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 203113552012 its reverse (210255311302), we get a palindrome (413368863314).

The spelling of 203113552012 in words is "two hundred three billion, one hundred thirteen million, five hundred fifty-two thousand, twelve".