30010021 has 2 divisors, whose sum is σ = 30010022. Its totient is φ = 30010020.

The previous prime is 30009979. The next prime is 30010033. The reversal of 30010021 is 12001003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 12040900 = 4239^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 30010021 - 2⁷ = 30009893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30009986 and 30010013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30010091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15005010 + 15005011.

It is an arithmetic number, because the mean of its divisors is an integer number (15005011).

Almost surely, 2^30010021 is an apocalyptic number.

It is an amenable number.

30010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30010021 is an equidigital number, since it uses as much as digits as its factorization.

30010021 is an evil number, because the sum of its binary digits is even.

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

The square root of 30010021 is about 5478.1402866301. The cubic root of 30010021 is about 310.7578440516.

Adding to 30010021 its reverse (12001003), we get a palindrome (42011024).

It can be divided in two parts, 3001002 and 1, that added together give a palindrome (3001003).

The spelling of 30010021 in words is "thirty million, ten thousand, twenty-one".