110120021209 has 4 divisors (see below), whose sum is σ = 120130932240. Its totient is φ = 100109110180.

The previous prime is 110120021177. The next prime is 110120021243. The reversal of 110120021209 is 902120021011.

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 110120021209 - 2⁵ = 110120021177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (110121021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005455499 + ... + 5005455520.

It is an arithmetic number, because the mean of its divisors is an integer number (30032733060).

Almost surely, 2^110120021209 is an apocalyptic number.

It is an amenable number.

110120021209 is a deficient number, since it is larger than the sum of its proper divisors (10010911031).

110120021209 is a wasteful number, since it uses less digits than its factorization.

110120021209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010911030.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 110120021209 in words is "one hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred nine".