210100213 has 4 divisors (see below), whose sum is σ = 210129228. Its totient is φ = 210071200.

The previous prime is 210100211. The next prime is 210100243. The reversal of 210100213 is 312001012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 76073284 + 134026929 = 8722^2 + 11577^2 .

It is a cyclic number.

It is not a de Polignac number, because 210100213 - 2¹ = 210100211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210100213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363 + ... + 21463.

It is an arithmetic number, because the mean of its divisors is an integer number (52532307).

Almost surely, 2^210100213 is an apocalyptic number.

It is an amenable number.

210100213 is a deficient number, since it is larger than the sum of its proper divisors (29015).

210100213 is a wasteful number, since it uses less digits than its factorization.

210100213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29014.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 210100213 is about 14494.8340107778. The cubic root of 210100213 is about 594.4867291692.

Adding to 210100213 its reverse (312001012), we get a palindrome (522101225).

The spelling of 210100213 in words is "two hundred ten million, one hundred thousand, two hundred thirteen".