211126861 has 16 divisors (see below), whose sum is σ = 236966400. Its totient is φ = 186444720.

The previous prime is 211126801. The next prime is 211126871. The reversal of 211126861 is 168621112.

It is not a de Polignac number, because 211126861 - 2⁷ = 211126733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211126801) 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 15 ways as a sum of consecutive naturals, for example, 93006 + ... + 95248.

It is an arithmetic number, because the mean of its divisors is an integer number (14810400).

Almost surely, 2^211126861 is an apocalyptic number.

It is an amenable number.

211126861 is a deficient number, since it is larger than the sum of its proper divisors (25839539).

211126861 is a wasteful number, since it uses less digits than its factorization.

211126861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496.

The product of its digits is 1152, while the sum is 28.

The square root of 211126861 is about 14530.2051258749. The cubic root of 211126861 is about 595.4534697160.

Adding to 211126861 its reverse (168621112), we get a palindrome (379747973).

The spelling of 211126861 in words is "two hundred eleven million, one hundred twenty-six thousand, eight hundred sixty-one".