1211120027111 has 2 divisors, whose sum is σ = 1211120027112. Its totient is φ = 1211120027110.

The previous prime is 1211120027041. The next prime is 1211120027149. The reversal of 1211120027111 is 1117200211121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211120027111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211120027311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560013555 + 605560013556.

It is an arithmetic number, because the mean of its divisors is an integer number (605560013556).

Almost surely, 2^{1211120027111} is an apocalyptic number.

1211120027111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211120027111 is an equidigital number, since it uses as much as digits as its factorization.

1211120027111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 1211120027111 its reverse (1117200211121), we get a palindrome (2328320238232).

The spelling of 1211120027111 in words is "one trillion, two hundred eleven billion, one hundred twenty million, twenty-seven thousand, one hundred eleven".