12020220109 has 4 divisors (see below), whose sum is σ = 12020858460. Its totient is φ = 12019581760.

The previous prime is 12020220089. The next prime is 12020220131. The reversal of 12020220109 is 90102202021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11792874025 + 227346084 = 108595^2 + 15078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020220109 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 (12020223109) 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, 290044 + ... + 328885.

It is an arithmetic number, because the mean of its divisors is an integer number (3005214615).

Almost surely, 2^12020220109 is an apocalyptic number.

It is an amenable number.

12020220109 is a deficient number, since it is larger than the sum of its proper divisors (638351).

12020220109 is an equidigital number, since it uses as much as digits as its factorization.

12020220109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638350.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 12020220109 in words is "twelve billion, twenty million, two hundred twenty thousand, one hundred nine".