1011112111211 has 2 divisors, whose sum is σ = 1011112111212. Its totient is φ = 1011112111210.

The previous prime is 1011112111199. The next prime is 1011112111213. The reversal of 1011112111211 is 1121112111101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011112111211 - 2¹⁸ = 1011111849067 is a prime.

Together with 1011112111213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1011112111213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505556055605 + 505556055606.

It is an arithmetic number, because the mean of its divisors is an integer number (505556055606).

Almost surely, 2^{1011112111211} is an apocalyptic number.

1011112111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011112111211 is an equidigital number, since it uses as much as digits as its factorization.

1011112111211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1011112111211 its reverse (1121112111101), we get a palindrome (2132224222312).

The spelling of 1011112111211 in words is "one trillion, eleven billion, one hundred twelve million, one hundred eleven thousand, two hundred eleven".