30021113220 has 144 divisors (see below), whose sum is σ = 97905866688. Its totient is φ = 6853351680.

The previous prime is 30021113209. The next prime is 30021113233. The reversal of 30021113220 is 2231112003.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30021113220.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2501835 + ... + 2513805.

It is an arithmetic number, because the mean of its divisors is an integer number (679901852).

Almost surely, 2^30021113220 is an apocalyptic number.

30021113220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30021113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48952933344).

30021113220 is an abundant number, since it is smaller than the sum of its proper divisors (67884753468).

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

30021113220 is a wasteful number, since it uses less digits than its factorization.

30021113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30021113220 its reverse (2231112003), we get a palindrome (32252225223).

The spelling of 30021113220 in words is "thirty billion, twenty-one million, one hundred thirteen thousand, two hundred twenty".