20020121222101 has 32 divisors (see below), whose sum is σ = 27146303122176. Its totient is φ = 14257512000000.

The previous prime is 20020121222063. The next prime is 20020121222117. The reversal of 20020121222101 is 10122212102002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020121222101 - 2¹¹ = 20020121220053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020121222161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98909400 + ... + 99111601.

It is an arithmetic number, because the mean of its divisors is an integer number (848321972568).

Almost surely, 2^{20020121222101} is an apocalyptic number.

It is an amenable number.

20020121222101 is a deficient number, since it is larger than the sum of its proper divisors (7126181900075).

20020121222101 is a wasteful number, since it uses less digits than its factorization.

20020121222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198021133.

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

Adding to 20020121222101 its reverse (10122212102002), we get a palindrome (30142333324103).

It can be divided in two parts, 20020 and 121222101, that added together give a palindrome (121242121).

The spelling of 20020121222101 in words is "twenty trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred one".