2123210 has 16 divisors (see below), whose sum is σ = 3841992. Its totient is φ = 844800.

The previous prime is 2123203. The next prime is 2123213. The reversal of 2123210 is 123212.

It is a happy number.

2123210 is nontrivially palindromic in base 11.

2123210 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 1620529 + 502681 = 1273^2 + 709^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2123191 and 2123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970 + ... + 2850.

2^2123210 is an apocalyptic number.

2123210 is a deficient number, since it is larger than the sum of its proper divisors (1718782).

2123210 is a wasteful number, since it uses less digits than its factorization.

2123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2123210 is about 1457.1238794282. The cubic root of 2123210 is about 128.5279706154.

Adding to 2123210 its reverse (123212), we get a palindrome (2246422).

The spelling of 2123210 in words is "two million, one hundred twenty-three thousand, two hundred ten".