11919100111 has 4 divisors (see below), whose sum is σ = 11924355400. Its totient is φ = 11913844824.

The previous prime is 11919100103. The next prime is 11919100133. The reversal of 11919100111 is 11100191911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11100191911 = 13907 ⋅798173.

It is a cyclic number.

It is not a de Polignac number, because 11919100111 - 2³ = 11919100103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11919103111) 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, 2624241 + ... + 2628778.

It is an arithmetic number, because the mean of its divisors is an integer number (2981088850).

Almost surely, 2^11919100111 is an apocalyptic number.

11919100111 is a deficient number, since it is larger than the sum of its proper divisors (5255289).

11919100111 is an equidigital number, since it uses as much as digits as its factorization.

11919100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255288.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 11919100111 in words is "eleven billion, nine hundred nineteen million, one hundred thousand, one hundred eleven".