202020100001021 has 16 divisors (see below), whose sum is σ = 213140133360000. Its totient is φ = 190948818557376.

The previous prime is 202020100000967. The next prime is 202020100001087. The reversal of 202020100001021 is 120100001020202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202020100001021 - 2⁴⁶ = 131651355823357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020100000993 and 202020100001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020100001221) 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, 845899895 + ... + 846138683.

It is an arithmetic number, because the mean of its divisors is an integer number (13321258335000).

Almost surely, 2^{202020100001021} is an apocalyptic number.

It is an amenable number.

202020100001021 is a deficient number, since it is larger than the sum of its proper divisors (11120033358979).

202020100001021 is a wasteful number, since it uses less digits than its factorization.

202020100001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340676.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202020100001021 its reverse (120100001020202), we get a palindrome (322120101021223).

The spelling of 202020100001021 in words is "two hundred two trillion, twenty billion, one hundred million, one thousand, twenty-one".