203331021133 has 12 divisors (see below), whose sum is σ = 211669178940. Its totient is φ = 195249908672.

The previous prime is 203331021097. The next prime is 203331021181. The reversal of 203331021133 is 331120133302.

It can be written as a sum of positive squares in 2 ways, for example, as 82169942409 + 121161078724 = 286653^2 + 348082^2 .

It is a de Polignac number, because none of the positive numbers 2^k-203331021133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203331021833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751288 + ... + 985441.

It is an arithmetic number, because the mean of its divisors is an integer number (17639098245).

Almost surely, 2^203331021133 is an apocalyptic number.

It is an amenable number.

203331021133 is a deficient number, since it is larger than the sum of its proper divisors (8338157807).

203331021133 is an equidigital number, since it uses as much as digits as its factorization.

203331021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736876 (or 1736829 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 203331021133 its reverse (331120133302), we get a palindrome (534451154435).

The spelling of 203331021133 in words is "two hundred three billion, three hundred thirty-one million, twenty-one thousand, one hundred thirty-three".