211320311 has 2 divisors, whose sum is σ = 211320312. Its totient is φ = 211320310.

The previous prime is 211320281. The next prime is 211320313. The reversal of 211320311 is 113023112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211320311 - 2⁶ = 211320247 is a prime.

It is a super-3 number, since 3×211320311³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 211320313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211320313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660155 + 105660156.

It is an arithmetic number, because the mean of its divisors is an integer number (105660156).

Almost surely, 2^211320311 is an apocalyptic number.

211320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

211320311 is an equidigital number, since it uses as much as digits as its factorization.

211320311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211320311 is about 14536.8604244520. The cubic root of 211320311 is about 595.6352803252.

Adding to 211320311 its reverse (113023112), we get a palindrome (324343423).

The spelling of 211320311 in words is "two hundred eleven million, three hundred twenty thousand, three hundred eleven".