10200020021 has 8 divisors (see below), whose sum is σ = 10814109600. Its totient is φ = 9593655120.

The previous prime is 10200020011. The next prime is 10200020069. The reversal of 10200020021 is 12002000201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10200020021 - 2⁶ = 10200019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10200019990 and 10200020008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200020011) 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 7 ways as a sum of consecutive naturals, for example, 1928450 + ... + 1933731.

It is an arithmetic number, because the mean of its divisors is an integer number (1351763700).

Almost surely, 2^10200020021 is an apocalyptic number.

It is an amenable number.

10200020021 is a deficient number, since it is larger than the sum of its proper divisors (614089579).

10200020021 is a wasteful number, since it uses less digits than its factorization.

10200020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862339.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 10200020021 its reverse (12002000201), we get a palindrome (22202020222).

The spelling of 10200020021 in words is "ten billion, two hundred million, twenty thousand, twenty-one".