30303011821 has 6 divisors (see below), whose sum is σ = 31981849422. Its totient is φ = 28708116120.

The previous prime is 30303011801. The next prime is 30303011833. The reversal of 30303011821 is 12811030303.

It can be written as a sum of positive squares in only one way, i.e., 25411548100 + 4891463721 = 159410^2 + 69939^2 .

It is not a de Polignac number, because 30303011821 - 2⁷ = 30303011693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30303011792 and 30303011801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30303011801) 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 in 5 ways as a sum of consecutive naturals, for example, 41970570 + ... + 41971291.

It is an arithmetic number, because the mean of its divisors is an integer number (5330308237).

Almost surely, 2^30303011821 is an apocalyptic number.

It is an amenable number.

30303011821 is a deficient number, since it is larger than the sum of its proper divisors (1678837601).

30303011821 is an equidigital number, since it uses as much as digits as its factorization.

30303011821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83941899 (or 83941880 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 30303011821 in words is "thirty billion, three hundred three million, eleven thousand, eight hundred twenty-one".