1101111001091 has 2 divisors, whose sum is σ = 1101111001092. Its totient is φ = 1101111001090.

The previous prime is 1101111001061. The next prime is 1101111001093. The reversal of 1101111001091 is 1901001111011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111001091 - 2²⁶ = 1101043892227 is a prime.

Together with 1101111001093, 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 (1101111001093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555500545 + 550555500546.

It is an arithmetic number, because the mean of its divisors is an integer number (550555500546).

Almost surely, 2^{1101111001091} is an apocalyptic number.

1101111001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111001091 is an equidigital number, since it uses as much as digits as its factorization.

1101111001091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 1101111001091 in words is "one trillion, one hundred one billion, one hundred eleven million, one thousand, ninety-one".