103330021 has 4 divisors (see below), whose sum is σ = 103988332. Its totient is φ = 102671712.

The previous prime is 103330001. The next prime is 103330027. The reversal of 103330021 is 120033301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120033301 = 4973 ⋅24137.

It can be written as a sum of positive squares in 2 ways, for example, as 33005025 + 70324996 = 5745^2 + 8386^2 .

It is a cyclic number.

It is not a de Polignac number, because 103330021 - 2²¹ = 101232869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103329983 and 103330010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103330027) 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, 328920 + ... + 329233.

It is an arithmetic number, because the mean of its divisors is an integer number (25997083).

Almost surely, 2^103330021 is an apocalyptic number.

It is an amenable number.

103330021 is a deficient number, since it is larger than the sum of its proper divisors (658311).

103330021 is an equidigital number, since it uses as much as digits as its factorization.

103330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658310.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 103330021 is about 10165.1375298124. The cubic root of 103330021 is about 469.2549248082.

Adding to 103330021 its reverse (120033301), we get a palindrome (223363322).

The spelling of 103330021 in words is "one hundred three million, three hundred thirty thousand, twenty-one".