110000021 has 4 divisors (see below), whose sum is σ = 110023200. Its totient is φ = 109976844.

The previous prime is 110000017. The next prime is 110000039. The reversal of 110000021 is 120000011.

It is a happy number.

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 110000021 - 2² = 110000017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110000221) 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, 1601 + ... + 14918.

It is an arithmetic number, because the mean of its divisors is an integer number (27505800).

Almost surely, 2^110000021 is an apocalyptic number.

It is an amenable number.

110000021 is a deficient number, since it is larger than the sum of its proper divisors (23179).

110000021 is an equidigital number, since it uses as much as digits as its factorization.

110000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23178.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 110000021 is about 10488.0894828372. The cubic root of 110000021 is about 479.1420161971.

Adding to 110000021 its reverse (120000011), we get a palindrome (230000032).

The spelling of 110000021 in words is "one hundred ten million, twenty-one", and thus it is an aban number.