211210210 has 16 divisors (see below), whose sum is σ = 402542136. Its totient is φ = 79514368.

The previous prime is 211210177. The next prime is 211210217. The reversal of 211210210 is 12012112.

It can be written as a sum of positive squares in 4 ways, for example, as 170798761 + 40411449 = 13069^2 + 6357^2 .

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

It is not an unprimeable number, because it can be changed into a prime (211210217) 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, 621037 + ... + 621376.

Almost surely, 2^211210210 is an apocalyptic number.

211210210 is a deficient number, since it is larger than the sum of its proper divisors (191331926).

211210210 is a wasteful number, since it uses less digits than its factorization.

211210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242437.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 211210210 is about 14533.0729716740. The cubic root of 211210210 is about 595.5318174314.

Adding to 211210210 its reverse (12012112), we get a palindrome (223222322).

It can be divided in two parts, 2112102 and 10, that added together give a palindrome (2112112).

The spelling of 211210210 in words is "two hundred eleven million, two hundred ten thousand, two hundred ten".