20020100221021 has 16 divisors (see below), whose sum is σ = 20077439166400. Its totient is φ = 19962845331840.

The previous prime is 20020100220973. The next prime is 20020100221087. The reversal of 20020100221021 is 12012200102002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020100221021 - 2¹⁷ = 20020100089949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020100220992 and 20020100221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020100221321) 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, 3674084305 + ... + 3674089753.

It is an arithmetic number, because the mean of its divisors is an integer number (1254839947900).

Almost surely, 2^{20020100221021} is an apocalyptic number.

It is an amenable number.

20020100221021 is a deficient number, since it is larger than the sum of its proper divisors (57338945379).

20020100221021 is a wasteful number, since it uses less digits than its factorization.

20020100221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11356.

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

Adding to 20020100221021 its reverse (12012200102002), we get a palindrome (32032300323023).

The spelling of 20020100221021 in words is "twenty trillion, twenty billion, one hundred million, two hundred twenty-one thousand, twenty-one".