220112012009 has 4 divisors (see below), whose sum is σ = 220113008004. Its totient is φ = 220111016016.

The previous prime is 220112011997. The next prime is 220112012011. The reversal of 220112012009 is 900210211022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 216527355625 + 3584656384 = 465325^2 + 59872^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112012009 - 2⁸ = 220112011753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220112012039) 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, 1502 + ... + 663495.

It is an arithmetic number, because the mean of its divisors is an integer number (55028252001).

Almost surely, 2^220112012009 is an apocalyptic number.

It is an amenable number.

220112012009 is a deficient number, since it is larger than the sum of its proper divisors (995995).

220112012009 is an equidigital number, since it uses as much as digits as its factorization.

220112012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995994.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 220112012009 in words is "two hundred twenty billion, one hundred twelve million, twelve thousand, nine".