210120213 has 4 divisors (see below), whose sum is σ = 280160288. Its totient is φ = 140080140.

The previous prime is 210120193. The next prime is 210120217. The reversal of 210120213 is 312021012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 210120213 - 2⁶ = 210120149 is a prime.

It is a super-2 number, since 2×210120213² = 88301007822330738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35020033 + ... + 35020038.

It is an arithmetic number, because the mean of its divisors is an integer number (70040072).

Almost surely, 2^210120213 is an apocalyptic number.

It is an amenable number.

210120213 is a deficient number, since it is larger than the sum of its proper divisors (70040075).

210120213 is an equidigital number, since it uses as much as digits as its factorization.

210120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70040074.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 210120213 is about 14495.5238953271. The cubic root of 210120213 is about 594.5055921635.

Adding to 210120213 its reverse (312021012), we get a palindrome (522141225).

The spelling of 210120213 in words is "two hundred ten million, one hundred twenty thousand, two hundred thirteen".