30021120 has 120 divisors (see below), whose sum is σ = 104051376. Its totient is φ = 7999488.

The previous prime is 30021091. The next prime is 30021137. The reversal of 30021120 is 2112003.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22389 + ... + 23691.

Almost surely, 2^30021120 is an apocalyptic number.

30021120 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 30021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52025688).

30021120 is an abundant number, since it is smaller than the sum of its proper divisors (74030256).

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

30021120 is a wasteful number, since it uses less digits than its factorization.

30021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30021120 is about 5479.1532192484. The cubic root of 30021120 is about 310.7961498805.

Adding to 30021120 its reverse (2112003), we get a palindrome (32133123).

The spelling of 30021120 in words is "thirty million, twenty-one thousand, one hundred twenty".