11109111012 has 48 divisors (see below), whose sum is σ = 28819123200. Its totient is φ = 3700758240.

The previous prime is 11109111011. The next prime is 11109111029. The reversal of 11109111012 is 21011190111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11109111011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149437 + ... + 211067.

It is an arithmetic number, because the mean of its divisors is an integer number (600398400).

Almost surely, 2^11109111012 is an apocalyptic number.

11109111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11109111012 is an abundant number, since it is smaller than the sum of its proper divisors (17710012188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11109111012 is a wasteful number, since it uses less digits than its factorization.

11109111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63313 (or 63305 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 18.

The spelling of 11109111012 in words is "eleven billion, one hundred nine million, one hundred eleven thousand, twelve".