211111201131109 has 2 divisors, whose sum is σ = 211111201131110. Its totient is φ = 211111201131108.

The previous prime is 211111201131071. The next prime is 211111201131137. The reversal of 211111201131109 is 901131102111112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108469683754884 + 102641517376225 = 10414878^2 + 10131215^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111201131109 - 2¹¹ = 211111201129061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111201131179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555600565554 + 105555600565555.

It is an arithmetic number, because the mean of its divisors is an integer number (105555600565555).

Almost surely, 2^{211111201131109} is an apocalyptic number.

It is an amenable number.

211111201131109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111201131109 is an equidigital number, since it uses as much as digits as its factorization.

211111201131109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 25.

The spelling of 211111201131109 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred one million, one hundred thirty-one thousand, one hundred nine".