210020120 has 16 divisors (see below), whose sum is σ = 472545360. Its totient is φ = 84008032.

The previous prime is 210020101. The next prime is 210020137. The reversal of 210020120 is 21020012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 210020098 and 210020107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2625212 + ... + 2625291.

It is an arithmetic number, because the mean of its divisors is an integer number (29534085).

Almost surely, 2^210020120 is an apocalyptic number.

210020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210020120 is an abundant number, since it is smaller than the sum of its proper divisors (262525240).

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

210020120 is a wasteful number, since it uses less digits than its factorization.

210020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250514 (or 5250510 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 210020120 is about 14492.0709355150. The cubic root of 210020120 is about 594.4111774812.

Adding to 210020120 its reverse (21020012), we get a palindrome (231040132).

The spelling of 210020120 in words is "two hundred ten million, twenty thousand, one hundred twenty".