211000211000111 has 4 divisors (see below), whose sum is σ = 227230996461672. Its totient is φ = 194769425538552.

The previous prime is 211000211000081. The next prime is 211000211000143. The reversal of 211000211000111 is 111000112000112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211000211000111 - 2³⁸ = 210725333093167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211000211000092 and 211000211000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211000211090111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8115392730761 + ... + 8115392730786.

It is an arithmetic number, because the mean of its divisors is an integer number (56807749115418).

Almost surely, 2^{211000211000111} is an apocalyptic number.

211000211000111 is a deficient number, since it is larger than the sum of its proper divisors (16230785461561).

211000211000111 is a wasteful number, since it uses less digits than its factorization.

211000211000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230785461560.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 211000211000111 its reverse (111000112000112), we get a palindrome (322000323000223).

The spelling of 211000211000111 in words is "two hundred eleven trillion, two hundred eleven million, one hundred eleven", and thus it is an aban number.