30010221 has 12 divisors (see below), whose sum is σ = 43540380. Its totient is φ = 19918080.

The previous prime is 30010213. The next prime is 30010229. The reversal of 30010221 is 12201003.

30010221 = T₁₀₈ + T₁₀₉ + ... + T₅₆₅.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30010213) and next prime (30010229).

It can be written as a sum of positive squares in 2 ways, for example, as 27405225 + 2604996 = 5235^2 + 1614^2 .

It is not a de Polignac number, because 30010221 - 2³ = 30010213 is a prime.

It is a super-2 number, since 2×30010221² = 1801226728937682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30010229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5220 + ... + 9341.

It is an arithmetic number, because the mean of its divisors is an integer number (3628365).

Almost surely, 2^30010221 is an apocalyptic number.

It is an amenable number.

30010221 is a deficient number, since it is larger than the sum of its proper divisors (13530159).

30010221 is a wasteful number, since it uses less digits than its factorization.

30010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14796 (or 14793 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30010221 is about 5478.1585409698. The cubic root of 30010221 is about 310.7585343925.

Adding to 30010221 its reverse (12201003), we get a palindrome (42211224).

The spelling of 30010221 in words is "thirty million, ten thousand, two hundred twenty-one".