211331011 has 2 divisors, whose sum is σ = 211331012. Its totient is φ = 211331010.

The previous prime is 211331009. The next prime is 211331051. The reversal of 211331011 is 110133112.

211331011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211331011 - 2¹ = 211331009 is a prime.

Together with 211331009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211330982 and 211331000.

It is not a weakly prime, because it can be changed into another prime (211331051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665505 + 105665506.

It is an arithmetic number, because the mean of its divisors is an integer number (105665506).

Almost surely, 2^211331011 is an apocalyptic number.

211331011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211331011 is an equidigital number, since it uses as much as digits as its factorization.

211331011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 211331011 is about 14537.2284497424. The cubic root of 211331011 is about 595.6453332947.

Adding to 211331011 its reverse (110133112), we get a palindrome (321464123).

It can be divided in two parts, 2113 and 31011, that added together give a square (33124 = 182²).

The spelling of 211331011 in words is "two hundred eleven million, three hundred thirty-one thousand, eleven".