211111013 has 2 divisors, whose sum is σ = 211111014. Its totient is φ = 211111012.

The previous prime is 211111003. The next prime is 211111051. The reversal of 211111013 is 310111112.

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., 211033729 + 77284 = 14527^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111013 - 2¹⁰ = 211109989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211110985 and 211111003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111003) 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, 105555506 + 105555507.

It is an arithmetic number, because the mean of its divisors is an integer number (105555507).

Almost surely, 2^211111013 is an apocalyptic number.

It is an amenable number.

211111013 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111013 is an equidigital number, since it uses as much as digits as its factorization.

211111013 is an odious number, because the sum of its binary digits is odd.

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

The square root of 211111013 is about 14529.6597689003. The cubic root of 211111013 is about 595.4385703286.

Adding to 211111013 its reverse (310111112), we get a palindrome (521222125).

Subtracting 211111013 from its reverse (310111112), we obtain a palindrome (99000099).

The spelling of 211111013 in words is "two hundred eleven million, one hundred eleven thousand, thirteen".