213311211 has 16 divisors (see below), whose sum is σ = 294861600. Its totient is φ = 137005568.

The previous prime is 213311209. The next prime is 213311213. The reversal of 213311211 is 112113312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213311209) and next prime (213311213).

It is a cyclic number.

It is not a de Polignac number, because 213311211 - 2¹ = 213311209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213311213) 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 15 ways as a sum of consecutive naturals, for example, 41875 + ... + 46691.

It is an arithmetic number, because the mean of its divisors is an integer number (18428850).

Almost surely, 2^213311211 is an apocalyptic number.

213311211 is a deficient number, since it is larger than the sum of its proper divisors (81550389).

213311211 is a wasteful number, since it uses less digits than its factorization.

213311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358.

The product of its digits is 36, while the sum is 15.

The square root of 213311211 is about 14605.1775408586. The cubic root of 213311211 is about 597.4999781750.

Adding to 213311211 its reverse (112113312), we get a palindrome (325424523).

The spelling of 213311211 in words is "two hundred thirteen million, three hundred eleven thousand, two hundred eleven".