11111111109893 has 4 divisors (see below), whose sum is σ = 11112572528928. Its totient is φ = 11109649690860.

The previous prime is 11111111109881. The next prime is 11111111109911. The reversal of 11111111109893 is 39890111111111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11111111109893 - 2¹⁶ = 11111111044357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111111109823) 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, 730698113 + ... + 730713318.

It is an arithmetic number, because the mean of its divisors is an integer number (2778143132232).

Almost surely, 2^{11111111109893} is an apocalyptic number.

It is an amenable number.

11111111109893 is a deficient number, since it is larger than the sum of its proper divisors (1461419035).

11111111109893 is an equidigital number, since it uses as much as digits as its factorization.

11111111109893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461419034.

The product of its (nonzero) digits is 1944, while the sum is 38.

The spelling of 11111111109893 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred nine thousand, eight hundred ninety-three".