103430021 has 4 divisors (see below), whose sum is σ = 103450944. Its totient is φ = 103409100.

The previous prime is 103429999. The next prime is 103430069. The reversal of 103430021 is 120034301.

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 a cyclic number.

It is not a de Polignac number, because 103430021 - 2⁶ = 103429957 is a prime.

It is a super-4 number, since 4×103430021⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103429978 and 103430005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103430071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556 + ... + 14466.

It is an arithmetic number, because the mean of its divisors is an integer number (25862736).

Almost surely, 2^103430021 is an apocalyptic number.

It is an amenable number.

103430021 is a deficient number, since it is larger than the sum of its proper divisors (20923).

103430021 is an equidigital number, since it uses as much as digits as its factorization.

103430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20922.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 103430021 is about 10170.0551129283. The cubic root of 103430021 is about 469.4062534102.

Adding to 103430021 its reverse (120034301), we get a palindrome (223464322).

The spelling of 103430021 in words is "one hundred three million, four hundred thirty thousand, twenty-one".