103203021 has 4 divisors (see below), whose sum is σ = 137604032. Its totient is φ = 68802012.

The previous prime is 103203017. The next prime is 103203071. The reversal of 103203021 is 120302301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 103203021 - 2² = 103203017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103202988 and 103203006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103203011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17200501 + ... + 17200506.

It is an arithmetic number, because the mean of its divisors is an integer number (34401008).

Almost surely, 2^103203021 is an apocalyptic number.

It is an amenable number.

103203021 is a deficient number, since it is larger than the sum of its proper divisors (34401011).

103203021 is an equidigital number, since it uses as much as digits as its factorization.

103203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34401010.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 103203021 is about 10158.8887679706. Note that the first 3 decimals coincide. The cubic root of 103203021 is about 469.0625966825.

Adding to 103203021 its reverse (120302301), we get a palindrome (223505322).

The spelling of 103203021 in words is "one hundred three million, two hundred three thousand, twenty-one".