10030021 has 4 divisors (see below), whose sum is σ = 10088172. Its totient is φ = 9971872.

The previous prime is 10030003. The next prime is 10030039. The reversal of 10030021 is 12003001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12003001 = 47 ⋅255383.

It is an interprime number because it is at equal distance from previous prime (10030003) and next prime (10030039).

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 3724900 = 2511^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 10030021 - 2⁵ = 10029989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10029986 and 10030013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10030421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28816 + ... + 29161.

It is an arithmetic number, because the mean of its divisors is an integer number (2522043).

Almost surely, 2^10030021 is an apocalyptic number.

It is an amenable number.

10030021 is a deficient number, since it is larger than the sum of its proper divisors (58151).

10030021 is an equidigital number, since it uses as much as digits as its factorization.

10030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58150.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 10030021 is about 3167.0208398430. The cubic root of 10030021 is about 215.6588478965.

Adding to 10030021 its reverse (12003001), we get a palindrome (22033022).

The spelling of 10030021 in words is "ten million, thirty thousand, twenty-one".