20020210010021 has 16 divisors (see below), whose sum is σ = 21620884385520. Its totient is φ = 18428262620160.

The previous prime is 20020210009993. The next prime is 20020210010027. The reversal of 20020210010021 is 12001001202002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 38460700996 + 19981749309025 = 196114^2 + 4470095^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020210010021 - 2⁶ = 20020210009957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20020210009984 and 20020210010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020210010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6533741 + ... + 9095613.

It is an arithmetic number, because the mean of its divisors is an integer number (1351305274095).

Almost surely, 2^{20020210010021} is an apocalyptic number.

It is an amenable number.

20020210010021 is a deficient number, since it is larger than the sum of its proper divisors (1600674375499).

20020210010021 is a wasteful number, since it uses less digits than its factorization.

20020210010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563576.

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

Adding to 20020210010021 its reverse (12001001202002), we get a palindrome (32021211212023).

The spelling of 20020210010021 in words is "twenty trillion, twenty billion, two hundred ten million, ten thousand, twenty-one".