20122011205 has 4 divisors (see below), whose sum is σ = 24146413452. Its totient is φ = 16097608960.

The previous prime is 20122011149. The next prime is 20122011229. The reversal of 20122011205 is 50211022102.

It is a happy number.

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 10038236481 + 10083774724 = 100191^2 + 100418^2 .

It is not a de Polignac number, because 20122011205 - 2¹¹ = 20122009157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012201116 + ... + 2012201125.

It is an arithmetic number, because the mean of its divisors is an integer number (6036603363).

Almost surely, 2^20122011205 is an apocalyptic number.

It is an amenable number.

20122011205 is a deficient number, since it is larger than the sum of its proper divisors (4024402247).

20122011205 is an equidigital number, since it uses as much as digits as its factorization.

20122011205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024402246.

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

Adding to 20122011205 its reverse (50211022102), we get a palindrome (70333033307).

The spelling of 20122011205 in words is "twenty billion, one hundred twenty-two million, eleven thousand, two hundred five".