30120321 has 32 divisors (see below), whose sum is σ = 50605056. Its totient is φ = 15480000.

The previous prime is 30120289. The next prime is 30120323. The reversal of 30120321 is 12302103.

It is a happy number.

It is not a de Polignac number, because 30120321 - 2⁵ = 30120289 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30120297 and 30120306.

It is not an unprimeable number, because it can be changed into a prime (30120323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22686 + ... + 23976.

It is an arithmetic number, because the mean of its divisors is an integer number (1581408).

Almost surely, 2^30120321 is an apocalyptic number.

It is an amenable number.

30120321 is a deficient number, since it is larger than the sum of its proper divisors (20484735).

30120321 is a wasteful number, since it uses less digits than its factorization.

30120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30120321 is about 5488.1983382527. The cubic root of 30120321 is about 311.1381023871.

Adding to 30120321 its reverse (12302103), we get a palindrome (42422424).

The spelling of 30120321 in words is "thirty million, one hundred twenty thousand, three hundred twenty-one".