20202102221121 has 12 divisors (see below), whose sum is σ = 29969484977172. Its totient is φ = 13104066305376.

The previous prime is 20202102221117. The next prime is 20202102221143. The reversal of 20202102221121 is 12112220120202.

It is a happy number.

20202102221121 is a `hidden beast` number, since 20 + 202 + 102 + 221 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7004285126721 + 13197817094400 = 2646561^2 + 3632880^2 .

It is not a de Polignac number, because 20202102221121 - 2² = 20202102221117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202102221094 and 20202102221103.

It is not an unprimeable number, because it can be changed into a prime (20202102220121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30333486486 + ... + 30333487151.

It is an arithmetic number, because the mean of its divisors is an integer number (2497457081431).

Almost surely, 2^{20202102221121} is an apocalyptic number.

It is an amenable number.

20202102221121 is a deficient number, since it is larger than the sum of its proper divisors (9767382756051).

20202102221121 is a wasteful number, since it uses less digits than its factorization.

20202102221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60666973680 (or 60666973677 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20202102221121 its reverse (12112220120202), we get a palindrome (32314322341323).

The spelling of 20202102221121 in words is "twenty trillion, two hundred two billion, one hundred two million, two hundred twenty-one thousand, one hundred twenty-one".