30120321021 has 32 divisors (see below), whose sum is σ = 46904582400. Its totient is φ = 17185791168.

The previous prime is 30120320987. The next prime is 30120321041. The reversal of 30120321021 is 12012302103.

It is not a de Polignac number, because 30120321021 - 2⁶ = 30120320957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120321041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675015 + ... + 718251.

It is an arithmetic number, because the mean of its divisors is an integer number (1465768200).

Almost surely, 2^30120321021 is an apocalyptic number.

It is an amenable number.

30120321021 is a deficient number, since it is larger than the sum of its proper divisors (16784261379).

30120321021 is an equidigital number, since it uses as much as digits as its factorization.

30120321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43938 (or 43924 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30120321021 its reverse (12012302103), we get a palindrome (42132623124).

The spelling of 30120321021 in words is "thirty billion, one hundred twenty million, three hundred twenty-one thousand, twenty-one".