2020112311121 has 4 divisors (see below), whose sum is σ = 2038645451700. Its totient is φ = 2001579170544.

The previous prime is 2020112311109. The next prime is 2020112311123. The reversal of 2020112311121 is 1211132110202.

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 1822122019600 + 197990291521 = 1349860^2 + 444961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020112311121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2020112311121.

It is not an unprimeable number, because it can be changed into a prime (2020112311123) 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, 9266570126 + ... + 9266570343.

It is an arithmetic number, because the mean of its divisors is an integer number (509661362925).

Almost surely, 2^{2020112311121} is an apocalyptic number.

It is an amenable number.

2020112311121 is a deficient number, since it is larger than the sum of its proper divisors (18533140579).

2020112311121 is a wasteful number, since it uses less digits than its factorization.

2020112311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18533140578.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2020112311121 its reverse (1211132110202), we get a palindrome (3231244421323).

The spelling of 2020112311121 in words is "two trillion, twenty billion, one hundred twelve million, three hundred eleven thousand, one hundred twenty-one".