210021012120 has 128 divisors (see below), whose sum is σ = 671215507200. Its totient is φ = 52418640384.

The previous prime is 210021012107. The next prime is 210021012163. The reversal of 210021012120 is 21210120012.

210021012120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210021012096 and 210021012105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365667 + ... + 744146.

It is an arithmetic number, because the mean of its divisors is an integer number (5243871150).

Almost surely, 2^210021012120 is an apocalyptic number.

210021012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021012120 is an abundant number, since it is smaller than the sum of its proper divisors (461194495080).

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

210021012120 is a wasteful number, since it uses less digits than its factorization.

210021012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109929 (or 1109925 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021012120 its reverse (21210120012), we get a palindrome (231231132132).

The spelling of 210021012120 in words is "two hundred ten billion, twenty-one million, twelve thousand, one hundred twenty".