110120021 has 8 divisors (see below), whose sum is σ = 125354304. Its totient is φ = 95756320.

The previous prime is 110120011. The next prime is 110120039. The reversal of 110120021 is 120021011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 110120021 - 2²² = 105925717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110119990 and 110120008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217376 + ... + 217881.

It is an arithmetic number, because the mean of its divisors is an integer number (15669288).

Almost surely, 2^110120021 is an apocalyptic number.

110120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110120021 is a deficient number, since it is larger than the sum of its proper divisors (15234283).

110120021 is a wasteful number, since it uses less digits than its factorization.

110120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435291.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 110120021 is about 10493.8086984660. The cubic root of 110120021 is about 479.3161863051.

Adding to 110120021 its reverse (120021011), we get a palindrome (230141032).

The spelling of 110120021 in words is "one hundred ten million, one hundred twenty thousand, twenty-one".