110109991820 has 24 divisors (see below), whose sum is σ = 238690048128. Its totient is φ = 42623222400.

The previous prime is 110109991819. The next prime is 110109991861. The reversal of 110109991820 is 28199901011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88797761 + ... + 88799000.

It is an arithmetic number, because the mean of its divisors is an integer number (9945418672).

Almost surely, 2^110109991820 is an apocalyptic number.

110109991820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

110109991820 is an abundant number, since it is smaller than the sum of its proper divisors (128580056308).

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

110109991820 is a wasteful number, since it uses less digits than its factorization.

110109991820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177596801 (or 177596799 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 110109991820 in words is "one hundred ten billion, one hundred nine million, nine hundred ninety-one thousand, eight hundred twenty".