211320213 has 16 divisors (see below), whose sum is σ = 304577280. Its totient is φ = 129553344.

The previous prime is 211320203. The next prime is 211320227. The reversal of 211320213 is 312023112.

It is not a de Polignac number, because 211320213 - 2¹² = 211316117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211320192 and 211320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420 + ... + 20562.

It is an arithmetic number, because the mean of its divisors is an integer number (19036080).

Almost surely, 2^211320213 is an apocalyptic number.

It is an amenable number.

211320213 is a deficient number, since it is larger than the sum of its proper divisors (93257067).

211320213 is a wasteful number, since it uses less digits than its factorization.

211320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20428.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211320213 is about 14536.8570537101. The cubic root of 211320213 is about 595.6351882497.

Adding to 211320213 its reverse (312023112), we get a palindrome (523343325).

The spelling of 211320213 in words is "two hundred eleven million, three hundred twenty thousand, two hundred thirteen".