19109190911111 has 16 divisors (see below), whose sum is σ = 22073885475840. Its totient is φ = 16203472144800.

The previous prime is 19109190911077. The next prime is 19109190911119. The reversal of 19109190911111 is 11111909190191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19109190911111 is a prime.

It is a super-2 number, since 2×19109190911111² (a number of 27 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 (19109190911119) 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 15 ways as a sum of consecutive naturals, for example, 10546031 + ... + 12224448.

It is an arithmetic number, because the mean of its divisors is an integer number (1379617842240).

Almost surely, 2^{19109190911111} is an apocalyptic number.

19109190911111 is a deficient number, since it is larger than the sum of its proper divisors (2964694564729).

19109190911111 is a wasteful number, since it uses less digits than its factorization.

19109190911111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22771774.

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

The spelling of 19109190911111 in words is "nineteen trillion, one hundred nine billion, one hundred ninety million, nine hundred eleven thousand, one hundred eleven".