201211213 has 4 divisors (see below), whose sum is σ = 229955680. Its totient is φ = 172466748.

The previous prime is 201211189. The next prime is 201211229. The reversal of 201211213 is 312112102.

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 201211213 - 2¹³ = 201203021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201211193 and 201211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14372223 + ... + 14372236.

It is an arithmetic number, because the mean of its divisors is an integer number (57488920).

Almost surely, 2^201211213 is an apocalyptic number.

It is an amenable number.

201211213 is a deficient number, since it is larger than the sum of its proper divisors (28744467).

201211213 is an equidigital number, since it uses as much as digits as its factorization.

201211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744466.

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

The square root of 201211213 is about 14184.8938311148. The cubic root of 201211213 is about 585.9817085928.

Adding to 201211213 its reverse (312112102), we get a palindrome (513323315).

It can be divided in two parts, 2012 and 11213, that added together give a square (13225 = 115²).

The spelling of 201211213 in words is "two hundred one million, two hundred eleven thousand, two hundred thirteen".