212102213 has 4 divisors (see below), whose sum is σ = 213053568. Its totient is φ = 211150860.

The previous prime is 212102203. The next prime is 212102221. The reversal of 212102213 is 312201212.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 212102213 - 2⁴ = 212102197 is a prime.

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 (212102203) 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, 475343 + ... + 475788.

It is an arithmetic number, because the mean of its divisors is an integer number (53263392).

Almost surely, 2^212102213 is an apocalyptic number.

It is an amenable number.

212102213 is a deficient number, since it is larger than the sum of its proper divisors (951355).

212102213 is an equidigital number, since it uses as much as digits as its factorization.

212102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951354.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212102213 is about 14563.7293644176. The cubic root of 212102213 is about 596.3690087930.

Adding to 212102213 its reverse (312201212), we get a palindrome (524303425).

The spelling of 212102213 in words is "two hundred twelve million, one hundred two thousand, two hundred thirteen".