211311101 has 2 divisors, whose sum is σ = 211311102. Its totient is φ = 211311100.

The previous prime is 211311091. The next prime is 211311119. The reversal of 211311101 is 101113112.

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., 145684900 + 65626201 = 12070^2 + 8101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211311101 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211311151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105655550 + 105655551.

It is an arithmetic number, because the mean of its divisors is an integer number (105655551).

Almost surely, 2^211311101 is an apocalyptic number.

It is an amenable number.

211311101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211311101 is an equidigital number, since it uses as much as digits as its factorization.

211311101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 211311101 is about 14536.5436400817. The cubic root of 211311101 is about 595.6266269834.

Adding to 211311101 its reverse (101113112), we get a palindrome (312424213).

The spelling of 211311101 in words is "two hundred eleven million, three hundred eleven thousand, one hundred one".