210120220 has 12 divisors (see below), whose sum is σ = 441252504. Its totient is φ = 84048080.

The previous prime is 210120217. The next prime is 210120233. The reversal of 210120220 is 22021012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 210120197 and 210120206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5252986 + ... + 5253025.

It is an arithmetic number, because the mean of its divisors is an integer number (36771042).

Almost surely, 2^210120220 is an apocalyptic number.

210120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120220 is an abundant number, since it is smaller than the sum of its proper divisors (231132284).

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

210120220 is a wasteful number, since it uses less digits than its factorization.

210120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506020 (or 10506018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 210120220 is about 14495.5241367810. The cubic root of 210120220 is about 594.5055987653.

Adding to 210120220 its reverse (22021012), we get a palindrome (232141232).

The spelling of 210120220 in words is "two hundred ten million, one hundred twenty thousand, two hundred twenty".