203121028 has 24 divisors (see below), whose sum is σ = 396031104. Its totient is φ = 90362400.

The previous prime is 203121013. The next prime is 203121041. The reversal of 203121028 is 820121302.

It is a junction number, because it is equal to n+sod(n) for n = 203120996 and 203121014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47043 + ... + 51178.

It is an arithmetic number, because the mean of its divisors is an integer number (16501296).

Almost surely, 2^203121028 is an apocalyptic number.

It is an amenable number.

203121028 is a deficient number, since it is larger than the sum of its proper divisors (192910076).

203121028 is a wasteful number, since it uses less digits than its factorization.

203121028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98283 (or 98281 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 203121028 is about 14252.0534660799. The cubic root of 203121028 is about 587.8298403149.

The spelling of 203121028 in words is "two hundred three million, one hundred twenty-one thousand, twenty-eight".