30021212120 has 16 divisors (see below), whose sum is σ = 67547727360. Its totient is φ = 12008484832.

The previous prime is 30021212099. The next prime is 30021212129. The reversal of 30021212120 is 2121212003.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30021212095 and 30021212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021212129) 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 3 ways as a sum of consecutive naturals, for example, 375265112 + ... + 375265191.

It is an arithmetic number, because the mean of its divisors is an integer number (4221732960).

Almost surely, 2^30021212120 is an apocalyptic number.

It is an amenable number.

30021212120 is an abundant number, since it is smaller than the sum of its proper divisors (37526515240).

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

30021212120 is a wasteful number, since it uses less digits than its factorization.

30021212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750530314 (or 750530310 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 30021212120 its reverse (2121212003), we get a palindrome (32142424123).

The spelling of 30021212120 in words is "thirty billion, twenty-one million, two hundred twelve thousand, one hundred twenty".