20120112205 has 16 divisors (see below), whose sum is σ = 24609590064. Its totient is φ = 15787284480.

The previous prime is 20120112203. The next prime is 20120112211. The reversal of 20120112205 is 50221102102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2270617801 + 17849494404 = 47651^2 + 133602^2 .

It is not a de Polignac number, because 20120112205 - 2¹ = 20120112203 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 (20120112203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14227 + ... + 201103.

It is an arithmetic number, because the mean of its divisors is an integer number (1538099379).

Almost surely, 2^20120112205 is an apocalyptic number.

It is an amenable number.

20120112205 is a deficient number, since it is larger than the sum of its proper divisors (4489477859).

20120112205 is a wasteful number, since it uses less digits than its factorization.

20120112205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187296.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20120112205 its reverse (50221102102), we get a palindrome (70341214307).

The spelling of 20120112205 in words is "twenty billion, one hundred twenty million, one hundred twelve thousand, two hundred five".