211126691 has 2 divisors, whose sum is σ = 211126692. Its totient is φ = 211126690.

The previous prime is 211126661. The next prime is 211126693. The reversal of 211126691 is 196621112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211126691 - 2⁶ = 211126627 is a prime.

Together with 211126693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211126693) 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 as a sum of consecutive naturals, namely, 105563345 + 105563346.

It is an arithmetic number, because the mean of its divisors is an integer number (105563346).

Almost surely, 2^211126691 is an apocalyptic number.

211126691 is a deficient number, since it is larger than the sum of its proper divisors (1).

211126691 is an equidigital number, since it uses as much as digits as its factorization.

211126691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 211126691 is about 14530.1992759907. The cubic root of 211126691 is about 595.4533098957.

The spelling of 211126691 in words is "two hundred eleven million, one hundred twenty-six thousand, six hundred ninety-one".