211055011 has 4 divisors (see below), whose sum is σ = 218332800. Its totient is φ = 203777224.

The previous prime is 211054997. The next prime is 211055093. The reversal of 211055011 is 110550112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211055011 - 2⁹ = 211054499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211055311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638851 + ... + 3638908.

It is an arithmetic number, because the mean of its divisors is an integer number (54583200).

Almost surely, 2^211055011 is an apocalyptic number.

211055011 is a deficient number, since it is larger than the sum of its proper divisors (7277789).

211055011 is an equidigital number, since it uses as much as digits as its factorization.

211055011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277788.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 211055011 is about 14527.7324796404. The cubic root of 211055011 is about 595.3859144623.

It can be divided in two parts, 2110 and 55011, that added together give a square (57121 = 239²).

The spelling of 211055011 in words is "two hundred eleven million, fifty-five thousand, eleven".