30000010021 has 2 divisors, whose sum is σ = 30000010022. Its totient is φ = 30000010020.

The previous prime is 30000009971. The next prime is 30000010057. The reversal of 30000010021 is 12001000003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22865673796 + 7134336225 = 151214^2 + 84465^2 .

It is an emirp because it is prime and its reverse (12001000003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30000010021 - 2²⁷ = 29865792293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30000009986 and 30000010013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30000010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000005010 + 15000005011.

It is an arithmetic number, because the mean of its divisors is an integer number (15000005011).

Almost surely, 2^30000010021 is an apocalyptic number.

It is an amenable number.

30000010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000010021 is an equidigital number, since it uses as much as digits as its factorization.

30000010021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 30000010021 its reverse (12001000003), we get a palindrome (42001010024).

The spelling of 30000010021 in words is "thirty billion, ten thousand, twenty-one".