111111211000211 has 2 divisors, whose sum is σ = 111111211000212. Its totient is φ = 111111211000210.

The previous prime is 111111211000171. The next prime is 111111211000343. The reversal of 111111211000211 is 112000112111111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111211000211 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111211000711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555605500105 + 55555605500106.

It is an arithmetic number, because the mean of its divisors is an integer number (55555605500106).

Almost surely, 2^{111111211000211} is an apocalyptic number.

111111211000211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111211000211 is an equidigital number, since it uses as much as digits as its factorization.

111111211000211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 111111211000211 its reverse (112000112111111), we get a palindrome (223111323111322).

The spelling of 111111211000211 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven", and thus it is an aban number.