12011100111091 has 2 divisors, whose sum is σ = 12011100111092. Its totient is φ = 12011100111090.

The previous prime is 12011100111019. The next prime is 12011100111119. The reversal of 12011100111091 is 19011100111021.

12011100111091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (12011100111019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12011100111091 - 2⁹ = 12011100110579 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011100121091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005550055545 + 6005550055546.

It is an arithmetic number, because the mean of its divisors is an integer number (6005550055546).

Almost surely, 2^{12011100111091} is an apocalyptic number.

12011100111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011100111091 is an equidigital number, since it uses as much as digits as its factorization.

12011100111091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 12011100111091 in words is "twelve trillion, eleven billion, one hundred million, one hundred eleven thousand, ninety-one".