30404102021 has 2 divisors, whose sum is σ = 30404102022. Its totient is φ = 30404102020.

The previous prime is 30404102011. The next prime is 30404102023. The reversal of 30404102021 is 12020140403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19941676225 + 10462425796 = 141215^2 + 102286^2 .

It is an emirp because it is prime and its reverse (12020140403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30404102021 - 2¹⁸ = 30403839877 is a prime.

Together with 30404102023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30404102023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15202051010 + 15202051011.

It is an arithmetic number, because the mean of its divisors is an integer number (15202051011).

Almost surely, 2^30404102021 is an apocalyptic number.

It is an amenable number.

30404102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30404102021 is an equidigital number, since it uses as much as digits as its factorization.

30404102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 30404102021 its reverse (12020140403), we get a palindrome (42424242424).

The spelling of 30404102021 in words is "thirty billion, four hundred four million, one hundred two thousand, twenty-one".