10200203021 has 4 divisors (see below), whose sum is σ = 10207082592. Its totient is φ = 10193323452.

The previous prime is 10200203011. The next prime is 10200203071. The reversal of 10200203021 is 12030200201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10200203021 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 = 10200202993 and 10200203011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200203011) 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 3 ways as a sum of consecutive naturals, for example, 3437561 + ... + 3440526.

It is an arithmetic number, because the mean of its divisors is an integer number (2551770648).

Almost surely, 2^10200203021 is an apocalyptic number.

It is an amenable number.

10200203021 is a deficient number, since it is larger than the sum of its proper divisors (6879571).

10200203021 is an equidigital number, since it uses as much as digits as its factorization.

10200203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879570.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 10200203021 its reverse (12030200201), we get a palindrome (22230403222).

The spelling of 10200203021 in words is "ten billion, two hundred million, two hundred three thousand, twenty-one".