20200201221121 has 16 divisors (see below), whose sum is σ = 20832984311040. Its totient is φ = 19576827406080.

The previous prime is 20200201221119. The next prime is 20200201221139. The reversal of 20200201221121 is 12112210200202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20200201221121 - 2¹ = 20200201221119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200201221095 and 20200201221104.

It is not an unprimeable number, because it can be changed into a prime (20200201221181) 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, 3216216 + ... + 7123513.

It is an arithmetic number, because the mean of its divisors is an integer number (1302061519440).

Almost surely, 2^{20200201221121} is an apocalyptic number.

It is an amenable number.

20200201221121 is a deficient number, since it is larger than the sum of its proper divisors (632783089919).

20200201221121 is a wasteful number, since it uses less digits than its factorization.

20200201221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340184.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20200201221121 its reverse (12112210200202), we get a palindrome (32312411421323).

The spelling of 20200201221121 in words is "twenty trillion, two hundred billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-one".