1091141111 has 4 divisors (see below), whose sum is σ = 1091314224. Its totient is φ = 1090968000.

The previous prime is 1091141089. The next prime is 1091141113. The reversal of 1091141111 is 1111411901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111411901 = 239 ⋅4650259.

It is a cyclic number.

It is not a de Polignac number, because 1091141111 - 2⁶ = 1091141047 is a prime.

It is a super-2 number, since 2×1091141111² = 2381177848228628642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091141113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76730 + ... + 89831.

It is an arithmetic number, because the mean of its divisors is an integer number (272828556).

Almost surely, 2^1091141111 is an apocalyptic number.

1091141111 is a deficient number, since it is larger than the sum of its proper divisors (173113).

1091141111 is an equidigital number, since it uses as much as digits as its factorization.

1091141111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173112.

The product of its (nonzero) digits is 36, while the sum is 20.

The square root of 1091141111 is about 33032.4251456050. The cubic root of 1091141111 is about 1029.5014745888.

The spelling of 1091141111 in words is "one billion, ninety-one million, one hundred forty-one thousand, one hundred eleven".