10030821 has 4 divisors (see below), whose sum is σ = 13374432. Its totient is φ = 6687212.

The previous prime is 10030777. The next prime is 10030837. The reversal of 10030821 is 12803001.

It is a happy number.

10030821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12803001 = 3 ⋅4267667.

It is a cyclic number.

It is not a de Polignac number, because 10030821 - 2¹⁰ = 10029797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10030821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10030871) 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, 1671801 + ... + 1671806.

It is an arithmetic number, because the mean of its divisors is an integer number (3343608).

Almost surely, 2^10030821 is an apocalyptic number.

It is an amenable number.

10030821 is a deficient number, since it is larger than the sum of its proper divisors (3343611).

10030821 is an equidigital number, since it uses as much as digits as its factorization.

10030821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343610.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 10030821 is about 3167.1471389880. The cubic root of 10030821 is about 215.6645814336.

Adding to 10030821 its reverse (12803001), we get a palindrome (22833822).

The spelling of 10030821 in words is "ten million, thirty thousand, eight hundred twenty-one".