21120330212120 has 32 divisors (see below), whose sum is σ = 47600076492000. Its totient is φ = 8434028348928.

The previous prime is 21120330212077. The next prime is 21120330212129. The reversal of 21120330212120 is 2121203302112.

It is a super-3 number, since 3×21120330212120³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21120330212092 and 21120330212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120330212129) 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 7 ways as a sum of consecutive naturals, for example, 440717489 + ... + 440765408.

It is an arithmetic number, because the mean of its divisors is an integer number (1487502390375).

Almost surely, 2^{21120330212120} is an apocalyptic number.

21120330212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120330212120 is an abundant number, since it is smaller than the sum of its proper divisors (26479746279880).

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

21120330212120 is a wasteful number, since it uses less digits than its factorization.

21120330212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881483507 (or 881483503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21120330212120 its reverse (2121203302112), we get a palindrome (23241533514232).

The spelling of 21120330212120 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty million, two hundred twelve thousand, one hundred twenty".