21330330120 has 144 divisors (see below), whose sum is σ = 76198793580. Its totient is φ = 5170978560.

The previous prime is 21330330113. The next prime is 21330330139. The reversal of 21330330120 is 2103303312.

21330330120 is a `hidden beast` number, since 2 + 1 + 330 + 330 + 1 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21217418244 + 112911876 = 145662^2 + 10626^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21330330093 and 21330330102.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 201279 + ... + 288398.

Almost surely, 2^21330330120 is an apocalyptic number.

21330330120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21330330120 is an abundant number, since it is smaller than the sum of its proper divisors (54868463460).

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

21330330120 is a wasteful number, since it uses less digits than its factorization.

21330330120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489716 (or 489698 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21330330120 its reverse (2103303312), we get a palindrome (23433633432).

The spelling of 21330330120 in words is "twenty-one billion, three hundred thirty million, three hundred thirty thousand, one hundred twenty".