203102203021 has 12 divisors (see below), whose sum is σ = 220769672992. Its totient is φ = 186709537728.

The previous prime is 203102202983. The next prime is 203102203037. The reversal of 203102203021 is 120302201302.

It is a de Polignac number, because none of the positive numbers 2^k-203102203021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203102202986 and 203102203004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203102203061) 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, 8159385 + ... + 8184238.

Almost surely, 2^203102203021 is an apocalyptic number.

It is an amenable number.

203102203021 is a deficient number, since it is larger than the sum of its proper divisors (17667469971).

203102203021 is a wasteful number, since it uses less digits than its factorization.

203102203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16343700 (or 16343683 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 203102203021 its reverse (120302201302), we get a palindrome (323404404323).

The spelling of 203102203021 in words is "two hundred three billion, one hundred two million, two hundred three thousand, twenty-one".