30120313021 has 32 divisors (see below), whose sum is σ = 32631330816. Its totient is φ = 27730560000.

The previous prime is 30120313019. The next prime is 30120313033. The reversal of 30120313021 is 12031302103.

It is not a de Polignac number, because 30120313021 - 2¹ = 30120313019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30120312986 and 30120313004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120313001) 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 in 31 ways as a sum of consecutive naturals, for example, 49621300 + ... + 49621906.

It is an arithmetic number, because the mean of its divisors is an integer number (1019729088).

Almost surely, 2^30120313021 is an apocalyptic number.

It is an amenable number.

30120313021 is a deficient number, since it is larger than the sum of its proper divisors (2511017795).

30120313021 is a wasteful number, since it uses less digits than its factorization.

30120313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30120313021 its reverse (12031302103), we get a palindrome (42151615124).

The spelling of 30120313021 in words is "thirty billion, one hundred twenty million, three hundred thirteen thousand, twenty-one".