30120120320 has 52 divisors (see below), whose sum is σ = 72279513660. Its totient is φ = 12048039936.

The previous prime is 30120120263. The next prime is 30120120347. The reversal of 30120120320 is 2302102103.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5473632256 + 24646488064 = 73984^2 + 156992^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30120120295 and 30120120304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714875 + ... + 755834.

Almost surely, 2^30120120320 is an apocalyptic number.

It is an amenable number.

30120120320 is an abundant number, since it is smaller than the sum of its proper divisors (42159393340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30120120320 is an equidigital number, since it uses as much as digits as its factorization.

30120120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470738 (or 1470716 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30120120320 its reverse (2302102103), we get a palindrome (32422222423).

The spelling of 30120120320 in words is "thirty billion, one hundred twenty million, one hundred twenty thousand, three hundred twenty".