211211030311 has 2 divisors, whose sum is σ = 211211030312. Its totient is φ = 211211030310.

The previous prime is 211211030309. The next prime is 211211030321. The reversal of 211211030311 is 113030112112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211211030311 - 2¹ = 211211030309 is a prime.

It is a super-2 number, since 2×211211030311² (a number of 23 digits) contains 22 as substring.

Together with 211211030309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211211030321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605515155 + 105605515156.

It is an arithmetic number, because the mean of its divisors is an integer number (105605515156).

Almost surely, 2^211211030311 is an apocalyptic number.

211211030311 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211030311 is an equidigital number, since it uses as much as digits as its factorization.

211211030311 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 16.

Adding to 211211030311 its reverse (113030112112), we get a palindrome (324241142423).

The spelling of 211211030311 in words is "two hundred eleven billion, two hundred eleven million, thirty thousand, three hundred eleven".