211011221101 has 2 divisors, whose sum is σ = 211011221102. Its totient is φ = 211011221100.

The previous prime is 211011221089. The next prime is 211011221119. The reversal of 211011221101 is 101122110112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172828107076 + 38183114025 = 415726^2 + 195405^2 .

It is a cyclic number.

It is not a de Polignac number, because 211011221101 - 2¹⁷ = 211011090029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211011221131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505610550 + 105505610551.

It is an arithmetic number, because the mean of its divisors is an integer number (105505610551).

Almost surely, 2^211011221101 is an apocalyptic number.

It is an amenable number.

211011221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011221101 is an equidigital number, since it uses as much as digits as its factorization.

211011221101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211011221101 its reverse (101122110112), we get a palindrome (312133331213).

The spelling of 211011221101 in words is "two hundred eleven billion, eleven million, two hundred twenty-one thousand, one hundred one".