20020100220121 has 12 divisors (see below), whose sum is σ = 20595386738640. Its totient is φ = 19460481238800.

The previous prime is 20020100220083. The next prime is 20020100220139. The reversal of 20020100220121 is 12102200102002.

It is a happy number.

It is not a de Polignac number, because 20020100220121 - 2⁷ = 20020100219993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020100220181) 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, 5518311 + ... + 8395948.

It is an arithmetic number, because the mean of its divisors is an integer number (1716282228220).

Almost surely, 2^{20020100220121} is an apocalyptic number.

It is an amenable number.

20020100220121 is a deficient number, since it is larger than the sum of its proper divisors (575286518519).

20020100220121 is a wasteful number, since it uses less digits than its factorization.

20020100220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13915384 (or 13915347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20020100220121 its reverse (12102200102002), we get a palindrome (32122300322123).

The spelling of 20020100220121 in words is "twenty trillion, twenty billion, one hundred million, two hundred twenty thousand, one hundred twenty-one".