203105332021 has 24 divisors (see below), whose sum is σ = 209873916000. Its totient is φ = 196540224864.

The previous prime is 203105332013. The next prime is 203105332033. The reversal of 203105332021 is 120233501302.

203105332021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203105332021 - 2³ = 203105332013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203105331983 and 203105332001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203105332051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82595490 + ... + 82597948.

It is an arithmetic number, because the mean of its divisors is an integer number (8744746500).

Almost surely, 2^203105332021 is an apocalyptic number.

It is an amenable number.

203105332021 is a deficient number, since it is larger than the sum of its proper divisors (6768583979).

203105332021 is a wasteful number, since it uses less digits than its factorization.

203105332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 203105332021 its reverse (120233501302), we get a palindrome (323338833323).

The spelling of 203105332021 in words is "two hundred three billion, one hundred five million, three hundred thirty-two thousand, twenty-one".