103030021 has 4 divisors (see below), whose sum is σ = 105426112. Its totient is φ = 100633932.

The previous prime is 103029991. The next prime is 103030033. The reversal of 103030021 is 120030301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120030301 = 337 ⋅356173.

It is not a de Polignac number, because 103030021 - 2¹³ = 103021829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103030051) 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, 1197981 + ... + 1198066.

It is an arithmetic number, because the mean of its divisors is an integer number (26356528).

Almost surely, 2^103030021 is an apocalyptic number.

It is an amenable number.

103030021 is a deficient number, since it is larger than the sum of its proper divisors (2396091).

103030021 is an equidigital number, since it uses as much as digits as its factorization.

103030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396090.

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

The square root of 103030021 is about 10150.3704858493. The cubic root of 103030021 is about 468.8003523747.

Adding to 103030021 its reverse (120030301), we get a palindrome (223060322).

The spelling of 103030021 in words is "one hundred three million, thirty thousand, twenty-one".