211111011011 has 8 divisors (see below), whose sum is σ = 214704140400. Its totient is φ = 207518380960.

The previous prime is 211111010993. The next prime is 211111011047. The reversal of 211111011011 is 110110111112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111011011 - 2³⁴ = 193931141827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211111010983 and 211111011001.

It is not an unprimeable number, because it can be changed into a prime (211111011211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783701 + ... + 1018041.

It is an arithmetic number, because the mean of its divisors is an integer number (26838017550).

Almost surely, 2^211111011011 is an apocalyptic number.

211111011011 is a deficient number, since it is larger than the sum of its proper divisors (3593129389).

211111011011 is a wasteful number, since it uses less digits than its factorization.

211111011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249669.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 211111011011 its reverse (110110111112), we get a palindrome (321221122123).

The spelling of 211111011011 in words is "two hundred eleven billion, one hundred eleven million, eleven thousand, eleven".