200103021 has 8 divisors (see below), whose sum is σ = 296448960. Its totient is φ = 133401996.

The previous prime is 200103019. The next prime is 200103049. The reversal of 200103021 is 120301002.

It is a happy number.

It is not a de Polignac number, because 200103021 - 2¹ = 200103019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200102994 and 200103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200103011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3705585 + ... + 3705638.

It is an arithmetic number, because the mean of its divisors is an integer number (37056120).

Almost surely, 2^200103021 is an apocalyptic number.

It is an amenable number.

200103021 is a deficient number, since it is larger than the sum of its proper divisors (96345939).

200103021 is an equidigital number, since it uses as much as digits as its factorization.

200103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411232 (or 7411226 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 200103021 is about 14145.7774971898. Note that the first 3 decimals coincide. The cubic root of 200103021 is about 584.9039421504.

Adding to 200103021 its reverse (120301002), we get a palindrome (320404023).

The spelling of 200103021 in words is "two hundred million, one hundred three thousand, twenty-one".