110040021 has 24 divisors (see below), whose sum is σ = 195628160. Its totient is φ = 58042656.

The previous prime is 110040017. The next prime is 110040037. The reversal of 110040021 is 120040011.

It is a happy number.

It is not a de Polignac number, because 110040021 - 2² = 110040017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 110039985 and 110040012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110040061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66361 + ... + 67998.

Almost surely, 2^110040021 is an apocalyptic number.

It is an amenable number.

110040021 is a deficient number, since it is larger than the sum of its proper divisors (85588139).

110040021 is a wasteful number, since it uses less digits than its factorization.

110040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134385 (or 134382 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 110040021 is about 10489.9962345084. The cubic root of 110040021 is about 479.2000869679.

Adding to 110040021 its reverse (120040011), we get a palindrome (230080032).

The spelling of 110040021 in words is "one hundred ten million, forty thousand, twenty-one".