1109191919111 has 4 divisors (see below), whose sum is σ = 1109962728000. Its totient is φ = 1108421110224.

The previous prime is 1109191919107. The next prime is 1109191919137. The reversal of 1109191919111 is 1119191919011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1109191919111 - 2² = 1109191919107 is a prime.

It is a super-2 number, since 2×1109191919111² (a number of 25 digits) 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 (1109191919141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385402286 + ... + 385405163.

It is an arithmetic number, because the mean of its divisors is an integer number (277490682000).

Almost surely, 2^{1109191919111} is an apocalyptic number.

1109191919111 is a deficient number, since it is larger than the sum of its proper divisors (770808889).

1109191919111 is an equidigital number, since it uses as much as digits as its factorization.

1109191919111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770808888.

The product of its (nonzero) digits is 6561, while the sum is 44.

Multiplying 1109191919111 by its sum of digits (44), we get a palindrome (48804444440884).

The spelling of 1109191919111 in words is "one trillion, one hundred nine billion, one hundred ninety-one million, nine hundred nineteen thousand, one hundred eleven".