20020100002021 has 12 divisors (see below), whose sum is σ = 23288974521888. Its totient is φ = 17159874415992.

The previous prime is 20020100001977. The next prime is 20020100002031. The reversal of 20020100002021 is 12020000102002.

It is not a de Polignac number, because 20020100002021 - 2¹¹ = 20020099999973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020100001989 and 20020100002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020100002031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1571590 + ... + 6519976.

It is an arithmetic number, because the mean of its divisors is an integer number (1940747876824).

Almost surely, 2^{20020100002021} is an apocalyptic number.

It is an amenable number.

20020100002021 is a deficient number, since it is larger than the sum of its proper divisors (3268874519867).

20020100002021 is an equidigital number, since it uses as much as digits as its factorization.

20020100002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030968 (or 5030961 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20020100002021 its reverse (12020000102002), we get a palindrome (32040100104023).

The spelling of 20020100002021 in words is "twenty trillion, twenty billion, one hundred million, two thousand, twenty-one".