12120210 has 24 divisors (see below), whose sum is σ = 31512780. Its totient is φ = 3232032.

The previous prime is 12120181. The next prime is 12120223. The reversal of 12120210 is 1202121.

It can be written as a sum of positive squares in 2 ways, for example, as 11553201 + 567009 = 3399^2 + 753^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12120192 and 12120201.

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 11 ways as a sum of consecutive naturals, for example, 67245 + ... + 67424.

Almost surely, 2^12120210 is an apocalyptic number.

12120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12120210 is an abundant number, since it is smaller than the sum of its proper divisors (19392570).

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

12120210 is a wasteful number, since it uses less digits than its factorization.

12120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134682 (or 134679 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12120210 is about 3481.4091974372. The cubic root of 12120210 is about 229.7047882308.

Adding to 12120210 its reverse (1202121), we get a palindrome (13322331).

The spelling of 12120210 in words is "twelve million, one hundred twenty thousand, two hundred ten".