30103021 has 16 divisors (see below), whose sum is σ = 34263936. Its totient is φ = 26237376.

The previous prime is 30103019. The next prime is 30103027. The reversal of 30103021 is 12030103.

It is a cyclic number.

It is not a de Polignac number, because 30103021 - 2¹ = 30103019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30102989 and 30103007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30103027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24211 + ... + 25423.

It is an arithmetic number, because the mean of its divisors is an integer number (2141496).

Almost surely, 2^30103021 is an apocalyptic number.

It is an amenable number.

30103021 is a deficient number, since it is larger than the sum of its proper divisors (4160915).

30103021 is a wasteful number, since it uses less digits than its factorization.

30103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 30103021 is about 5486.6220026534. The cubic root of 30103021 is about 311.0785222336.

Adding to 30103021 its reverse (12030103), we get a palindrome (42133124).

The spelling of 30103021 in words is "thirty million, one hundred three thousand, twenty-one".