210120212 has 6 divisors (see below), whose sum is σ = 367710378. Its totient is φ = 105060104.

The previous prime is 210120193. The next prime is 210120217. The reversal of 210120212 is 212021012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 200109316 + 10010896 = 14146^2 + 3164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210120193 and 210120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120217) by changing a digit.

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 as a sum of consecutive naturals, namely, 26265023 + ... + 26265030.

It is an arithmetic number, because the mean of its divisors is an integer number (61285063).

Almost surely, 2^210120212 is an apocalyptic number.

It is an amenable number.

210120212 is a deficient number, since it is larger than the sum of its proper divisors (157590166).

210120212 is a wasteful number, since it uses less digits than its factorization.

210120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52530057 (or 52530055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 210120212 is about 14495.5238608337. The cubic root of 210120212 is about 594.5055912204.

Adding to 210120212 its reverse (212021012), we get a palindrome (422141224).

The spelling of 210120212 in words is "two hundred ten million, one hundred twenty thousand, two hundred twelve".