30120221312 has 32 divisors (see below), whose sum is σ = 60017178420. Its totient is φ = 15057086464.

The previous prime is 30120221293. The next prime is 30120221321. The reversal of 30120221312 is 21312202103.

It can be written as a sum of positive squares in 2 ways, for example, as 27166950976 + 2953270336 = 164824^2 + 54344^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703298 + ... + 744894.

Almost surely, 2^30120221312 is an apocalyptic number.

30120221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30120221312 is a deficient number, since it is larger than the sum of its proper divisors (29896957108).

30120221312 is an equidigital number, since it uses as much as digits as its factorization.

30120221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47268 (or 47256 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30120221312 its reverse (21312202103), we get a palindrome (51432423415).

The spelling of 30120221312 in words is "thirty billion, one hundred twenty million, two hundred twenty-one thousand, three hundred twelve".