211213201 has 4 divisors (see below), whose sum is σ = 211242304. Its totient is φ = 211184100.

The previous prime is 211213157. The next prime is 211213207. The reversal of 211213201 is 102312112.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211213201 - 2⁷ = 211213073 is a prime.

It is a super-2 number, since 2×211213201² = 89222032553332802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211213207) 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, 6196 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (52810576).

Almost surely, 2^211213201 is an apocalyptic number.

It is an amenable number.

211213201 is a deficient number, since it is larger than the sum of its proper divisors (29103).

211213201 is a wasteful number, since it uses less digits than its factorization.

211213201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29102.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 211213201 is about 14533.1758745293. The cubic root of 211213201 is about 595.5346285759.

Adding to 211213201 its reverse (102312112), we get a palindrome (313525313).

The spelling of 211213201 in words is "two hundred eleven million, two hundred thirteen thousand, two hundred one".