210212101 has 4 divisors (see below), whose sum is σ = 229322304. Its totient is φ = 191101900.

The previous prime is 210212047. The next prime is 210212131. The reversal of 210212101 is 101212012.

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 de Polignac number, because none of the positive numbers 2^k-210212101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212131) 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, 9555085 + ... + 9555106.

It is an arithmetic number, because the mean of its divisors is an integer number (57330576).

Almost surely, 2^210212101 is an apocalyptic number.

It is an amenable number.

210212101 is a deficient number, since it is larger than the sum of its proper divisors (19110203).

210212101 is a wasteful number, since it uses less digits than its factorization.

210212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110202.

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

The square root of 210212101 is about 14498.6930790330. The cubic root of 210212101 is about 594.5922409250.

Adding to 210212101 its reverse (101212012), we get a palindrome (311424113).

The spelling of 210212101 in words is "two hundred ten million, two hundred twelve thousand, one hundred one".