211211066 has 20 divisors (see below), whose sum is σ = 348544410. Its totient is φ = 95991720.

The previous prime is 211211053. The next prime is 211211071. The reversal of 211211066 is 660112112.

211211066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149352841 + 61858225 = 12221^2 + 7865^2 .

It is a super-2 number, since 2×211211066² = 89220228801712712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25676 + ... + 32888.

Almost surely, 2^211211066 is an apocalyptic number.

211211066 is a deficient number, since it is larger than the sum of its proper divisors (137333344).

211211066 is an frugal number, since it uses more digits than its factorization.

211211066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259 (or 7226 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 211211066 is about 14533.1024217130. The cubic root of 211211066 is about 595.5326219609.

Adding to 211211066 its reverse (660112112), we get a palindrome (871323178).

The spelling of 211211066 in words is "two hundred eleven million, two hundred eleven thousand, sixty-six".