211131320011 has 2 divisors, whose sum is σ = 211131320012. Its totient is φ = 211131320010.

The previous prime is 211131319957. The next prime is 211131320083. The reversal of 211131320011 is 110023131112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211131320011 - 2⁹ = 211131319499 is a prime.

It is not a weakly prime, because it can be changed into another prime (211131320311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105565660005 + 105565660006.

It is an arithmetic number, because the mean of its divisors is an integer number (105565660006).

Almost surely, 2^211131320011 is an apocalyptic number.

211131320011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211131320011 is an equidigital number, since it uses as much as digits as its factorization.

211131320011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211131320011 its reverse (110023131112), we get a palindrome (321154451123).

The spelling of 211131320011 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred twenty thousand, eleven".