211321110311 has 2 divisors, whose sum is σ = 211321110312. Its totient is φ = 211321110310.

The previous prime is 211321110307. The next prime is 211321110379. The reversal of 211321110311 is 113011123112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211321110311 - 2² = 211321110307 is a prime.

It is a super-2 number, since 2×211321110311² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211321110311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211321110391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660555155 + 105660555156.

It is an arithmetic number, because the mean of its divisors is an integer number (105660555156).

Almost surely, 2^211321110311 is an apocalyptic number.

211321110311 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321110311 is an equidigital number, since it uses as much as digits as its factorization.

211321110311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 211321110311 its reverse (113011123112), we get a palindrome (324332233423).

The spelling of 211321110311 in words is "two hundred eleven billion, three hundred twenty-one million, one hundred ten thousand, three hundred eleven".